diff --git a/erpnext/stock/report/batch_item_expiry_status/batch_item_expiry_status.py b/erpnext/stock/report/batch_item_expiry_status/batch_item_expiry_status.py
index 3d9b046..ef7d6e6 100644
--- a/erpnext/stock/report/batch_item_expiry_status/batch_item_expiry_status.py
+++ b/erpnext/stock/report/batch_item_expiry_status/batch_item_expiry_status.py
@@ -4,6 +4,7 @@
 
 import frappe
 from frappe import _
+from frappe.query_builder.functions import IfNull
 from frappe.utils import cint, getdate
 
 
@@ -54,31 +55,28 @@
 	return columns
 
 
-def get_conditions(filters):
-	conditions = ""
+def get_stock_ledger_entries(filters):
 	if not filters.get("from_date"):
 		frappe.throw(_("'From Date' is required"))
 
-	if filters.get("to_date"):
-		conditions += " and posting_date <= '%s'" % filters["to_date"]
-	else:
+	if not filters.get("to_date"):
 		frappe.throw(_("'To Date' is required"))
 
-	return conditions
-
-
-def get_stock_ledger_entries(filters):
-	conditions = get_conditions(filters)
-	return frappe.db.sql(
-		"""select item_code, batch_no, warehouse,
-		posting_date, actual_qty
-		from `tabStock Ledger Entry`
-		where is_cancelled = 0
-		and docstatus < 2 and ifnull(batch_no, '') != '' %s order by item_code, warehouse"""
-		% conditions,
-		as_dict=1,
+	sle = frappe.qb.DocType("Stock Ledger Entry")
+	query = (
+		frappe.qb.from_(sle)
+		.select(sle.item_code, sle.batch_no, sle.warehouse, sle.posting_date, sle.actual_qty)
+		.where(
+			(sle.is_cancelled == 0)
+			& (sle.docstatus < 2)
+			& (IfNull(sle.batch_no, "") != "")
+			& (sle.posting_date <= filters["to_date"])
+		)
+		.orderby(sle.item_code, sle.warehouse)
 	)
 
+	return query.run(as_dict=True)
+
 
 def get_item_warehouse_batch_map(filters, float_precision):
 	sle = get_stock_ledger_entries(filters)
@@ -112,7 +110,7 @@
 
 def get_item_details(filters):
 	item_map = {}
-	for d in frappe.db.sql("select name, item_name, description from tabItem", as_dict=1):
+	for d in (frappe.qb.from_("Item").select("name", "item_name", "description")).run(as_dict=True):
 		item_map.setdefault(d.name, d)
 
 	return item_map
diff --git a/erpnext/stock/report/batch_wise_balance_history/batch_wise_balance_history.py b/erpnext/stock/report/batch_wise_balance_history/batch_wise_balance_history.py
index 291c6b5..0d57938 100644
--- a/erpnext/stock/report/batch_wise_balance_history/batch_wise_balance_history.py
+++ b/erpnext/stock/report/batch_wise_balance_history/batch_wise_balance_history.py
@@ -71,6 +71,8 @@
 def get_stock_ledger_entries(filters):
 	if not filters.get("from_date"):
 		frappe.throw(_("'From Date' is required"))
+	if not filters.get("to_date"):
+		frappe.throw(_("'To Date' is required"))
 
 	sle = frappe.qb.DocType("Stock Ledger Entry")
 	query = (
@@ -85,18 +87,13 @@
 		.where(
 			(sle.docstatus < 2)
 			& (sle.is_cancelled == 0)
-			& (sle.batch_no.isnotnull())
-			& (sle.batch_no != "")
+			& (fn.IfNull(sle.batch_no, "") != "")
+			& (sle.posting_date <= filters["to_date"])
 		)
 		.groupby(sle.voucher_no, sle.batch_no, sle.item_code, sle.warehouse)
 		.orderby(sle.item_code, sle.warehouse)
 	)
 
-	if to_date := filters.get("to_date"):
-		query = query.where(sle.posting_date <= to_date)
-	else:
-		frappe.throw(_("'To Date' is required"))
-
 	query = apply_warehouse_filter(query, sle, filters)
 	for field in ["item_code", "batch_no", "company"]:
 		if filters.get(field):
@@ -136,7 +133,9 @@
 
 def get_item_details(filters):
 	item_map = {}
-	for d in frappe.db.sql("select name, item_name, description, stock_uom from tabItem", as_dict=1):
+	for d in (frappe.qb.from_("Item").select("name", "item_name", "description", "stock_uom")).run(
+		as_dict=1
+	):
 		item_map.setdefault(d.name, d)
 
 	return item_map
diff --git a/erpnext/stock/report/delayed_item_report/delayed_item_report.py b/erpnext/stock/report/delayed_item_report/delayed_item_report.py
index 9df24d6..546a834 100644
--- a/erpnext/stock/report/delayed_item_report/delayed_item_report.py
+++ b/erpnext/stock/report/delayed_item_report/delayed_item_report.py
@@ -21,56 +21,54 @@
 		return self.get_columns(), self.get_data() or []
 
 	def get_data(self, consolidated=False):
-		conditions = ""
-
 		doctype = self.filters.get("based_on")
-		child_doc = "%s Item" % doctype
+		sales_order_field = "sales_order" if doctype == "Sales Invoice" else "against_sales_order"
+
+		parent = frappe.qb.DocType(doctype)
+		child = frappe.qb.DocType(f"{doctype} Item")
+
+		query = (
+			frappe.qb.from_(child)
+			.from_(parent)
+			.select(
+				child.item_code,
+				child.item_name,
+				child.item_group,
+				child.qty,
+				child.rate,
+				child.amount,
+				child.so_detail,
+				child[sales_order_field].as_("sales_order"),
+				parent.shipping_address_name,
+				parent.po_no,
+				parent.customer,
+				parent.posting_date,
+				parent.name,
+				parent.grand_total,
+			)
+			.where(
+				(child.parent == parent.name)
+				& (parent.docstatus == 1)
+				& (parent.posting_date.between(self.filters.get("from_date"), self.filters.get("to_date")))
+				& (child[sales_order_field].notnull())
+				& (child[sales_order_field] != "")
+			)
+		)
 
 		if doctype == "Sales Invoice":
-			conditions = " and `tabSales Invoice`.update_stock = 1 and `tabSales Invoice`.is_pos = 0"
+			query = query.where((parent.update_stock == 1) & (parent.is_pos == 0))
 
 		if self.filters.get("item_group"):
-			conditions += " and `tab%s`.item_group = %s" % (
-				child_doc,
-				frappe.db.escape(self.filters.get("item_group")),
-			)
-
-		for field in ["customer", "customer_group", "company"]:
-			if self.filters.get(field):
-				conditions += " and `tab%s`.%s = %s" % (
-					doctype,
-					field,
-					frappe.db.escape(self.filters.get(field)),
-				)
-
-		sales_order_field = "against_sales_order"
-		if doctype == "Sales Invoice":
-			sales_order_field = "sales_order"
+			query = query.where(child.item_group == self.filters.get("item_group"))
 
 		if self.filters.get("sales_order"):
-			conditions = " and `tab%s`.%s = '%s'" % (
-				child_doc,
-				sales_order_field,
-				self.filters.get("sales_order"),
-			)
+			query = query.where(child[sales_order_field] == self.filters.get("sales_order"))
 
-		self.transactions = frappe.db.sql(
-			""" SELECT `tab{child_doc}`.item_code, `tab{child_doc}`.item_name,
-				`tab{child_doc}`.item_group, `tab{child_doc}`.qty, `tab{child_doc}`.rate, `tab{child_doc}`.amount,
-				`tab{child_doc}`.so_detail, `tab{child_doc}`.{so_field} as sales_order,
-				`tab{doctype}`.shipping_address_name, `tab{doctype}`.po_no, `tab{doctype}`.customer,
-				`tab{doctype}`.posting_date, `tab{doctype}`.name, `tab{doctype}`.grand_total
-			FROM `tab{child_doc}`, `tab{doctype}`
-			WHERE
-				`tab{child_doc}`.parent = `tab{doctype}`.name and `tab{doctype}`.docstatus = 1 and
-				`tab{doctype}`.posting_date between %(from_date)s and %(to_date)s and
-				`tab{child_doc}`.{so_field} is not null and `tab{child_doc}`.{so_field} != '' {cond}
-		""".format(
-				cond=conditions, doctype=doctype, child_doc=child_doc, so_field=sales_order_field
-			),
-			{"from_date": self.filters.get("from_date"), "to_date": self.filters.get("to_date")},
-			as_dict=1,
-		)
+		for field in ("customer", "customer_group", "company"):
+			if self.filters.get(field):
+				query = query.where(parent[field] == self.filters.get(field))
+
+		self.transactions = query.run(as_dict=True)
 
 		if self.transactions:
 			self.filter_transactions_data(consolidated)
diff --git a/erpnext/stock/report/item_prices/item_prices.py b/erpnext/stock/report/item_prices/item_prices.py
index 87f1a42..ab47b4a 100644
--- a/erpnext/stock/report/item_prices/item_prices.py
+++ b/erpnext/stock/report/item_prices/item_prices.py
@@ -4,6 +4,7 @@
 
 import frappe
 from frappe import _
+from frappe.query_builder.functions import IfNull, Sum
 from frappe.utils import flt
 
 
@@ -12,8 +13,7 @@
 		filters = {}
 
 	columns = get_columns(filters)
-	conditions = get_condition(filters)
-	item_map = get_item_details(conditions)
+	item_map = get_item_details(filters)
 	pl = get_price_list()
 	last_purchase_rate = get_last_purchase_rate()
 	bom_rate = get_item_bom_rate()
@@ -63,18 +63,24 @@
 	return columns
 
 
-def get_item_details(conditions):
+def get_item_details(filters):
 	"""returns all items details"""
 
 	item_map = {}
 
-	for i in frappe.db.sql(
-		"""select name, item_group, item_name, description,
-		brand, stock_uom from tabItem %s
-		order by item_code, item_group"""
-		% (conditions),
-		as_dict=1,
-	):
+	item = frappe.qb.DocType("Item")
+	query = (
+		frappe.qb.from_(item)
+		.select(item.name, item.item_group, item.item_name, item.description, item.brand, item.stock_uom)
+		.orderby(item.item_code, item.item_group)
+	)
+
+	if filters.get("items") == "Enabled Items only":
+		query = query.where(item.disabled == 0)
+	elif filters.get("items") == "Disabled Items only":
+		query = query.where(item.disabled == 1)
+
+	for i in query.run(as_dict=True):
 		item_map.setdefault(i.name, i)
 
 	return item_map
@@ -85,19 +91,38 @@
 
 	rate = {}
 
-	price_list = frappe.db.sql(
-		"""select ip.item_code, ip.buying, ip.selling,
-		concat(ifnull(cu.symbol,ip.currency), " ", round(ip.price_list_rate,2), " - ", ip.price_list) as price
-		from `tabItem Price` ip, `tabPrice List` pl, `tabCurrency` cu
-		where ip.price_list=pl.name and pl.currency=cu.name and pl.enabled=1""",
-		as_dict=1,
-	)
+	ip = frappe.qb.DocType("Item Price")
+	pl = frappe.qb.DocType("Price List")
+	cu = frappe.qb.DocType("Currency")
 
-	for j in price_list:
-		if j.price:
-			rate.setdefault(j.item_code, {}).setdefault("Buying" if j.buying else "Selling", []).append(
-				j.price
+	price_list = (
+		frappe.qb.from_(ip)
+		.from_(pl)
+		.from_(cu)
+		.select(
+			ip.item_code,
+			ip.buying,
+			ip.selling,
+			(IfNull(cu.symbol, ip.currency)).as_("currency"),
+			ip.price_list_rate,
+			ip.price_list,
+		)
+		.where((ip.price_list == pl.name) & (pl.currency == cu.name) & (pl.enabled == 1))
+	).run(as_dict=True)
+
+	for d in price_list:
+		d.update(
+			{"price": "{0} {1} - {2}".format(d.currency, round(d.price_list_rate, 2), d.price_list)}
+		)
+		d.pop("currency")
+		d.pop("price_list_rate")
+		d.pop("price_list")
+
+		if d.price:
+			rate.setdefault(d.item_code, {}).setdefault("Buying" if d.buying else "Selling", []).append(
+				d.price
 			)
+
 	item_rate_map = {}
 
 	for item in rate:
@@ -112,30 +137,39 @@
 def get_last_purchase_rate():
 	item_last_purchase_rate_map = {}
 
-	query = """select * from (
-				(select
-					po_item.item_code,
-					po.transaction_date as posting_date,
-					po_item.base_rate
-				from `tabPurchase Order` po, `tabPurchase Order Item` po_item
-					where po.name = po_item.parent and po.docstatus = 1)
-				union
-				(select
-					pr_item.item_code,
-					pr.posting_date,
-					pr_item.base_rate
-				from `tabPurchase Receipt` pr, `tabPurchase Receipt Item` pr_item
-					where pr.name = pr_item.parent and pr.docstatus = 1)
-				union
-				(select
-					pi_item.item_code,
-					pi.posting_date,
-					pi_item.base_rate
-				from `tabPurchase Invoice` pi, `tabPurchase Invoice Item` pi_item
-					where pi.name = pi_item.parent and pi.docstatus = 1 and pi.update_stock = 1)
-				) result order by result.item_code asc, result.posting_date asc"""
+	po = frappe.qb.DocType("Purchase Order")
+	pr = frappe.qb.DocType("Purchase Receipt")
+	pi = frappe.qb.DocType("Purchase Invoice")
+	po_item = frappe.qb.DocType("Purchase Order Item")
+	pr_item = frappe.qb.DocType("Purchase Receipt Item")
+	pi_item = frappe.qb.DocType("Purchase Invoice Item")
 
-	for d in frappe.db.sql(query, as_dict=1):
+	query = (
+		frappe.qb.from_(
+			(
+				frappe.qb.from_(po)
+				.from_(po_item)
+				.select(po_item.item_code, po.transaction_date.as_("posting_date"), po_item.base_rate)
+				.where((po.name == po_item.parent) & (po.docstatus == 1))
+			)
+			+ (
+				frappe.qb.from_(pr)
+				.from_(pr_item)
+				.select(pr_item.item_code, pr.posting_date, pr_item.base_rate)
+				.where((pr.name == pr_item.parent) & (pr.docstatus == 1))
+			)
+			+ (
+				frappe.qb.from_(pi)
+				.from_(pi_item)
+				.select(pi_item.item_code, pi.posting_date, pi_item.base_rate)
+				.where((pi.name == pi_item.parent) & (pi.docstatus == 1) & (pi.update_stock == 1))
+			)
+		)
+		.select("*")
+		.orderby("item_code", "posting_date")
+	)
+
+	for d in query.run(as_dict=True):
 		item_last_purchase_rate_map[d.item_code] = d.base_rate
 
 	return item_last_purchase_rate_map
@@ -146,12 +180,15 @@
 
 	item_bom_map = {}
 
-	for b in frappe.db.sql(
-		"""select item, (total_cost/quantity) as bom_rate
-		from `tabBOM` where is_active=1 and is_default=1""",
-		as_dict=1,
-	):
-		item_bom_map.setdefault(b.item, flt(b.bom_rate))
+	bom = frappe.qb.DocType("BOM")
+	bom_data = (
+		frappe.qb.from_(bom)
+		.select(bom.item, (bom.total_cost / bom.quantity).as_("bom_rate"))
+		.where((bom.is_active == 1) & (bom.is_default == 1))
+	).run(as_dict=True)
+
+	for d in bom_data:
+		item_bom_map.setdefault(d.item, flt(d.bom_rate))
 
 	return item_bom_map
 
@@ -161,25 +198,17 @@
 
 	item_val_rate_map = {}
 
-	for d in frappe.db.sql(
-		"""select item_code,
-		sum(actual_qty*valuation_rate)/sum(actual_qty) as val_rate
-		from tabBin where actual_qty > 0 group by item_code""",
-		as_dict=1,
-	):
+	bin = frappe.qb.DocType("Bin")
+	bin_data = (
+		frappe.qb.from_(bin)
+		.select(
+			bin.item_code, Sum(bin.actual_qty * bin.valuation_rate) / Sum(bin.actual_qty).as_("val_rate")
+		)
+		.where(bin.actual_qty > 0)
+		.groupby(bin.item_code)
+	).run(as_dict=True)
+
+	for d in bin_data:
 		item_val_rate_map.setdefault(d.item_code, d.val_rate)
 
 	return item_val_rate_map
-
-
-def get_condition(filters):
-	"""Get Filter Items"""
-
-	if filters.get("items") == "Enabled Items only":
-		conditions = " where disabled=0 "
-	elif filters.get("items") == "Disabled Items only":
-		conditions = " where disabled=1 "
-	else:
-		conditions = ""
-
-	return conditions
diff --git a/erpnext/stock/report/stock_projected_qty/stock_projected_qty.py b/erpnext/stock/report/stock_projected_qty/stock_projected_qty.py
index 49e797d..f477d8f 100644
--- a/erpnext/stock/report/stock_projected_qty/stock_projected_qty.py
+++ b/erpnext/stock/report/stock_projected_qty/stock_projected_qty.py
@@ -5,6 +5,7 @@
 import frappe
 from frappe import _
 from frappe.utils import flt, today
+from pypika.terms import ExistsCriterion
 
 from erpnext.accounts.doctype.pos_invoice.pos_invoice import get_pos_reserved_qty
 from erpnext.stock.utils import (
@@ -218,10 +219,26 @@
 
 
 def get_bin_list(filters):
-	conditions = []
+	bin = frappe.qb.DocType("Bin")
+	query = (
+		frappe.qb.from_(bin)
+		.select(
+			bin.item_code,
+			bin.warehouse,
+			bin.actual_qty,
+			bin.planned_qty,
+			bin.indented_qty,
+			bin.ordered_qty,
+			bin.reserved_qty,
+			bin.reserved_qty_for_production,
+			bin.reserved_qty_for_sub_contract,
+			bin.projected_qty,
+		)
+		.orderby(bin.item_code, bin.warehouse)
+	)
 
 	if filters.item_code:
-		conditions.append("item_code = '%s' " % filters.item_code)
+		query = query.where(bin.item_code == filters.item_code)
 
 	if filters.warehouse:
 		warehouse_details = frappe.db.get_value(
@@ -229,21 +246,20 @@
 		)
 
 		if warehouse_details:
-			conditions.append(
-				" exists (select name from `tabWarehouse` wh \
-				where wh.lft >= %s and wh.rgt <= %s and bin.warehouse = wh.name)"
-				% (warehouse_details.lft, warehouse_details.rgt)
+			wh = frappe.qb.DocType("Warehouse")
+			query = query.where(
+				ExistsCriterion(
+					frappe.qb.from_(wh)
+					.select(wh.name)
+					.where(
+						(wh.lft >= warehouse_details.lft)
+						& (wh.rgt <= warehouse_details.rgt)
+						& (bin.warehouse == wh.name)
+					)
+				)
 			)
 
-	bin_list = frappe.db.sql(
-		"""select item_code, warehouse, actual_qty, planned_qty, indented_qty,
-		ordered_qty, reserved_qty, reserved_qty_for_production, reserved_qty_for_sub_contract, projected_qty
-		from tabBin bin {conditions} order by item_code, warehouse
-		""".format(
-			conditions=" where " + " and ".join(conditions) if conditions else ""
-		),
-		as_dict=1,
-	)
+	bin_list = query.run(as_dict=True)
 
 	return bin_list
 
@@ -251,45 +267,43 @@
 def get_item_map(item_code, include_uom):
 	"""Optimization: get only the item doc and re_order_levels table"""
 
-	condition = ""
-	if item_code:
-		condition = "and item_code = {0}".format(frappe.db.escape(item_code, percent=False))
+	bin = frappe.qb.DocType("Bin")
+	item = frappe.qb.DocType("Item")
 
-	cf_field = cf_join = ""
-	if include_uom:
-		cf_field = ", ucd.conversion_factor"
-		cf_join = (
-			"left join `tabUOM Conversion Detail` ucd on ucd.parent=item.name and ucd.uom=%(include_uom)s"
+	query = (
+		frappe.qb.from_(item)
+		.select(item.name, item.item_name, item.description, item.item_group, item.brand, item.stock_uom)
+		.where(
+			(item.is_stock_item == 1)
+			& (item.disabled == 0)
+			& (
+				(item.end_of_life > today()) | (item.end_of_life.isnull()) | (item.end_of_life == "0000-00-00")
+			)
+			& (ExistsCriterion(frappe.qb.from_(bin).select(bin.name).where(bin.item_code == item.name)))
 		)
-
-	items = frappe.db.sql(
-		"""
-		select item.name, item.item_name, item.description, item.item_group, item.brand, item.stock_uom{cf_field}
-		from `tabItem` item
-		{cf_join}
-		where item.is_stock_item = 1
-		and item.disabled=0
-		{condition}
-		and (item.end_of_life > %(today)s or item.end_of_life is null or item.end_of_life='0000-00-00')
-		and exists (select name from `tabBin` bin where bin.item_code=item.name)""".format(
-			cf_field=cf_field, cf_join=cf_join, condition=condition
-		),
-		{"today": today(), "include_uom": include_uom},
-		as_dict=True,
 	)
 
-	condition = ""
 	if item_code:
-		condition = "where parent={0}".format(frappe.db.escape(item_code, percent=False))
+		query = query.where(item.item_code == item_code)
+
+	if include_uom:
+		ucd = frappe.qb.DocType("UOM Conversion Detail")
+		query = query.left_join(ucd).on((ucd.parent == item.name) & (ucd.uom == include_uom))
+
+	items = query.run(as_dict=True)
+
+	ir = frappe.qb.DocType("Item Reorder")
+	query = frappe.qb.from_(ir).select("*")
+
+	if item_code:
+		query = query.where(ir.parent == item_code)
 
 	reorder_levels = frappe._dict()
-	for ir in frappe.db.sql(
-		"""select * from `tabItem Reorder` {condition}""".format(condition=condition), as_dict=1
-	):
-		if ir.parent not in reorder_levels:
-			reorder_levels[ir.parent] = []
+	for d in query.run(as_dict=True):
+		if d.parent not in reorder_levels:
+			reorder_levels[d.parent] = []
 
-		reorder_levels[ir.parent].append(ir)
+		reorder_levels[d.parent].append(d)
 
 	item_map = frappe._dict()
 	for item in items:
diff --git a/erpnext/stock/report/supplier_wise_sales_analytics/supplier_wise_sales_analytics.py b/erpnext/stock/report/supplier_wise_sales_analytics/supplier_wise_sales_analytics.py
index 5430fe6..8c76908 100644
--- a/erpnext/stock/report/supplier_wise_sales_analytics/supplier_wise_sales_analytics.py
+++ b/erpnext/stock/report/supplier_wise_sales_analytics/supplier_wise_sales_analytics.py
@@ -4,6 +4,7 @@
 
 import frappe
 from frappe import _
+from frappe.query_builder.functions import IfNull
 from frappe.utils import flt
 
 
@@ -70,31 +71,33 @@
 	return columns
 
 
-def get_conditions(filters):
-	conditions = ""
-	values = []
+def get_consumed_details(filters):
+	item = frappe.qb.DocType("Item")
+	sle = frappe.qb.DocType("Stock Ledger Entry")
+
+	query = (
+		frappe.qb.from_(sle)
+		.from_(item)
+		.select(
+			sle.item_code,
+			item.item_name,
+			item.description,
+			item.stock_uom,
+			sle.actual_qty,
+			sle.stock_value_difference,
+			sle.voucher_no,
+			sle.voucher_type,
+		)
+		.where((sle.is_cancelled == 0) & (sle.item_code == item.name) & (sle.actual_qty < 0))
+	)
 
 	if filters.get("from_date") and filters.get("to_date"):
-		conditions = "and sle.posting_date>=%s and sle.posting_date<=%s"
-		values = [filters.get("from_date"), filters.get("to_date")]
+		query = query.where(
+			(sle.posting_date >= filters.get("from_date")) & (sle.posting_date <= filters.get("to_date"))
+		)
 
-	return conditions, values
-
-
-def get_consumed_details(filters):
-	conditions, values = get_conditions(filters)
 	consumed_details = {}
-
-	for d in frappe.db.sql(
-		"""select sle.item_code, i.item_name, i.description,
-		i.stock_uom, sle.actual_qty, sle.stock_value_difference,
-		sle.voucher_no, sle.voucher_type
-		from `tabStock Ledger Entry` sle, `tabItem` i
-		where sle.is_cancelled = 0 and sle.item_code=i.name and sle.actual_qty < 0 %s"""
-		% conditions,
-		values,
-		as_dict=1,
-	):
+	for d in query.run(as_dict=True):
 		consumed_details.setdefault(d.item_code, []).append(d)
 
 	return consumed_details
@@ -104,24 +107,54 @@
 	item_supplier_map = {}
 	supplier = filters.get("supplier")
 
-	for d in frappe.db.sql(
-		"""select pr.supplier, pri.item_code from
-		`tabPurchase Receipt` pr, `tabPurchase Receipt Item` pri
-		where pr.name=pri.parent and pr.docstatus=1 and
-		pri.item_code=(select name from `tabItem` where
-			is_stock_item=1 and name=pri.item_code)""",
-		as_dict=1,
-	):
+	item = frappe.qb.DocType("Item")
+	pr = frappe.qb.DocType("Purchase Receipt")
+	pr_item = frappe.qb.DocType("Purchase Receipt Item")
+
+	query = (
+		frappe.qb.from_(pr)
+		.from_(pr_item)
+		.select(pr.supplier, pr_item.item_code)
+		.where(
+			(pr.name == pr_item.parent)
+			& (pr.docstatus == 1)
+			& (
+				pr_item.item_code
+				== (
+					frappe.qb.from_(item)
+					.select(item.name)
+					.where((item.is_stock_item == 1) & (item.name == pr_item.item_code))
+				)
+			)
+		)
+	)
+
+	for d in query.run(as_dict=True):
 		item_supplier_map.setdefault(d.item_code, []).append(d.supplier)
 
-	for d in frappe.db.sql(
-		"""select pr.supplier, pri.item_code from
-		`tabPurchase Invoice` pr, `tabPurchase Invoice Item` pri
-		where pr.name=pri.parent and pr.docstatus=1 and
-		ifnull(pr.update_stock, 0) = 1 and pri.item_code=(select name from `tabItem`
-			where is_stock_item=1 and name=pri.item_code)""",
-		as_dict=1,
-	):
+	pi = frappe.qb.DocType("Purchase Invoice")
+	pi_item = frappe.qb.DocType("Purchase Invoice Item")
+
+	query = (
+		frappe.qb.from_(pi)
+		.from_(pi_item)
+		.select(pi.supplier, pi_item.item_code)
+		.where(
+			(pi.name == pi_item.parent)
+			& (pi.docstatus == 1)
+			& (IfNull(pi.update_stock, 0) == 1)
+			& (
+				pi_item.item_code
+				== (
+					frappe.qb.from_(item)
+					.select(item.name)
+					.where((item.is_stock_item == 1) & (item.name == pi_item.item_code))
+				)
+			)
+		)
+	)
+
+	for d in query.run(as_dict=True):
 		if d.item_code not in item_supplier_map:
 			item_supplier_map.setdefault(d.item_code, []).append(d.supplier)
 
@@ -138,7 +171,11 @@
 
 
 def get_material_transfer_vouchers():
-	return frappe.db.sql_list(
-		"""select name from `tabStock Entry` where
-		purpose='Material Transfer' and docstatus=1"""
+	se = frappe.qb.DocType("Stock Entry")
+	query = (
+		frappe.qb.from_(se)
+		.select(se.name)
+		.where((se.purpose == "Material Transfer") & (se.docstatus == 1))
 	)
+
+	return [r[0] for r in query.run()]
diff --git a/erpnext/stock/report/total_stock_summary/total_stock_summary.py b/erpnext/stock/report/total_stock_summary/total_stock_summary.py
index 21529da..c3155bd 100644
--- a/erpnext/stock/report/total_stock_summary/total_stock_summary.py
+++ b/erpnext/stock/report/total_stock_summary/total_stock_summary.py
@@ -4,60 +4,58 @@
 
 import frappe
 from frappe import _
+from frappe.query_builder.functions import Sum
 
 
 def execute(filters=None):
 
 	if not filters:
 		filters = {}
-	columns = get_columns()
+	columns = get_columns(filters)
 	stock = get_total_stock(filters)
 
 	return columns, stock
 
 
-def get_columns():
+def get_columns(filters):
 	columns = [
-		_("Company") + ":Link/Company:250",
-		_("Warehouse") + ":Link/Warehouse:150",
 		_("Item") + ":Link/Item:150",
 		_("Description") + "::300",
 		_("Current Qty") + ":Float:100",
 	]
 
+	if filters.get("group_by") == "Warehouse":
+		columns.insert(0, _("Warehouse") + ":Link/Warehouse:150")
+	else:
+		columns.insert(0, _("Company") + ":Link/Company:250")
+
 	return columns
 
 
 def get_total_stock(filters):
-	conditions = ""
-	columns = ""
+	bin = frappe.qb.DocType("Bin")
+	item = frappe.qb.DocType("Item")
+	wh = frappe.qb.DocType("Warehouse")
+
+	query = (
+		frappe.qb.from_(bin)
+		.inner_join(item)
+		.on(bin.item_code == item.item_code)
+		.inner_join(wh)
+		.on(wh.name == bin.warehouse)
+		.where(bin.actual_qty != 0)
+	)
 
 	if filters.get("group_by") == "Warehouse":
 		if filters.get("company"):
-			conditions += " AND warehouse.company = %s" % frappe.db.escape(
-				filters.get("company"), percent=False
-			)
+			query = query.where(wh.company == filters.get("company"))
 
-		conditions += " GROUP BY ledger.warehouse, item.item_code"
-		columns += "'' as company, ledger.warehouse"
+		query = query.select(bin.warehouse).groupby(bin.warehouse)
 	else:
-		conditions += " GROUP BY warehouse.company, item.item_code"
-		columns += " warehouse.company, '' as warehouse"
+		query = query.select(wh.company).groupby(wh.company)
 
-	return frappe.db.sql(
-		"""
-			SELECT
-				%s,
-				item.item_code,
-				item.description,
-				sum(ledger.actual_qty) as actual_qty
-			FROM
-				`tabBin` AS ledger
-			INNER JOIN `tabItem` AS item
-				ON ledger.item_code = item.item_code
-			INNER JOIN `tabWarehouse` warehouse
-				ON warehouse.name = ledger.warehouse
-			WHERE
-				ledger.actual_qty != 0 %s"""
-		% (columns, conditions)
-	)
+	query = query.select(
+		item.item_code, item.description, Sum(bin.actual_qty).as_("actual_qty")
+	).groupby(item.item_code)
+
+	return query.run()
diff --git a/erpnext/stock/report/warehouse_wise_item_balance_age_and_value/warehouse_wise_item_balance_age_and_value.py b/erpnext/stock/report/warehouse_wise_item_balance_age_and_value/warehouse_wise_item_balance_age_and_value.py
index a54373f..eedf1a0 100644
--- a/erpnext/stock/report/warehouse_wise_item_balance_age_and_value/warehouse_wise_item_balance_age_and_value.py
+++ b/erpnext/stock/report/warehouse_wise_item_balance_age_and_value/warehouse_wise_item_balance_age_and_value.py
@@ -7,6 +7,7 @@
 
 import frappe
 from frappe import _
+from frappe.query_builder.functions import Count
 from frappe.utils import flt
 
 from erpnext.stock.report.stock_ageing.stock_ageing import FIFOSlots, get_average_age
@@ -98,7 +99,7 @@
 
 def validate_filters(filters):
 	if not (filters.get("item_code") or filters.get("warehouse")):
-		sle_count = flt(frappe.db.sql("""select count(name) from `tabStock Ledger Entry`""")[0][0])
+		sle_count = flt(frappe.qb.from_("Stock Ledger Entry").select(Count("name")).run()[0][0])
 		if sle_count > 500000:
 			frappe.throw(_("Please set filter based on Item or Warehouse"))
 	if not filters.get("company"):
@@ -108,25 +109,16 @@
 def get_warehouse_list(filters):
 	from frappe.core.doctype.user_permission.user_permission import get_permitted_documents
 
-	condition = ""
-	user_permitted_warehouse = get_permitted_documents("Warehouse")
-	value = ()
-	if user_permitted_warehouse:
-		condition = "and name in %s"
-		value = set(user_permitted_warehouse)
-	elif not user_permitted_warehouse and filters.get("warehouse"):
-		condition = "and name = %s"
-		value = filters.get("warehouse")
+	wh = frappe.qb.DocType("Warehouse")
+	query = frappe.qb.from_(wh).select(wh.name).where(wh.is_group == 0)
 
-	return frappe.db.sql(
-		"""select name
-		from `tabWarehouse` where is_group = 0
-		{condition}""".format(
-			condition=condition
-		),
-		value,
-		as_dict=1,
-	)
+	user_permitted_warehouse = get_permitted_documents("Warehouse")
+	if user_permitted_warehouse:
+		query = query.where(wh.name.isin(set(user_permitted_warehouse)))
+	elif filters.get("warehouse"):
+		query = query.where(wh.name == filters.get("warehouse"))
+
+	return query.run(as_dict=True)
 
 
 def add_warehouse_column(columns, warehouse_list):