diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.py b/erpnext/accounts/doctype/payment_entry/payment_entry.py
index a10a810..f7a57bb 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.py
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.py
@@ -1444,7 +1444,7 @@
 	voucher_type = "Sales Invoice" if party_type == "Customer" else "Purchase Invoice"
 	supplier_condition = ""
 	if voucher_type == "Purchase Invoice":
-		supplier_condition = "and (release_date is null or release_date <= CURDATE())"
+		supplier_condition = "and (release_date is null or release_date <= CURRENT_DATE)"
 	if party_account_currency == company_currency:
 		grand_total_field = "base_grand_total"
 		rounded_total_field = "base_rounded_total"
diff --git a/erpnext/accounts/report/inactive_sales_items/inactive_sales_items.py b/erpnext/accounts/report/inactive_sales_items/inactive_sales_items.py
index 1a00399..230b18c 100644
--- a/erpnext/accounts/report/inactive_sales_items/inactive_sales_items.py
+++ b/erpnext/accounts/report/inactive_sales_items/inactive_sales_items.py
@@ -100,7 +100,7 @@
 	sales_data = frappe.db.sql(
 		"""
 		select s.territory, s.customer, si.item_group, si.item_code, si.qty, {date_field} as last_order_date,
-		DATEDIFF(CURDATE(), {date_field}) as days_since_last_order
+		DATEDIFF(CURRENT_DATE, {date_field}) as days_since_last_order
 		from `tab{doctype}` s, `tab{doctype} Item` si
 		where s.name = si.parent and s.docstatus = 1
 		order by days_since_last_order """.format(  # nosec
diff --git a/erpnext/buying/doctype/purchase_order/test_purchase_order.py b/erpnext/buying/doctype/purchase_order/test_purchase_order.py
index 1a7f2dd..d732b75 100644
--- a/erpnext/buying/doctype/purchase_order/test_purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/test_purchase_order.py
@@ -330,7 +330,7 @@
 		else:
 			# update valid from
 			frappe.db.sql(
-				"""UPDATE `tabItem Tax` set valid_from = CURDATE()
+				"""UPDATE `tabItem Tax` set valid_from = CURRENT_DATE
 				where parent = %(item)s and item_tax_template = %(tax)s""",
 				{"item": item, "tax": tax_template},
 			)
diff --git a/erpnext/controllers/queries.py b/erpnext/controllers/queries.py
index 1497b18..a725f67 100644
--- a/erpnext/controllers/queries.py
+++ b/erpnext/controllers/queries.py
@@ -691,7 +691,7 @@
 def get_batch_numbers(doctype, txt, searchfield, start, page_len, filters):
 	query = """select batch_id from `tabBatch`
 			where disabled = 0
-			and (expiry_date >= CURDATE() or expiry_date IS NULL)
+			and (expiry_date >= CURRENT_DATE or expiry_date IS NULL)
 			and name like {txt}""".format(
 		txt=frappe.db.escape("%{0}%".format(txt))
 	)
diff --git a/erpnext/crm/doctype/opportunity/opportunity.py b/erpnext/crm/doctype/opportunity/opportunity.py
index b590177..c70a4f6 100644
--- a/erpnext/crm/doctype/opportunity/opportunity.py
+++ b/erpnext/crm/doctype/opportunity/opportunity.py
@@ -8,7 +8,8 @@
 from frappe import _
 from frappe.email.inbox import link_communication_to_document
 from frappe.model.mapper import get_mapped_doc
-from frappe.query_builder import DocType
+from frappe.query_builder import DocType, Interval
+from frappe.query_builder.functions import Now
 from frappe.utils import cint, flt, get_fullname
 
 from erpnext.crm.utils import add_link_in_communication, copy_comments
@@ -398,15 +399,17 @@
 		frappe.db.get_single_value("CRM Settings", "close_opportunity_after_days") or 15
 	)
 
-	opportunities = frappe.db.sql(
-		""" select name from tabOpportunity where status='Replied' and
-		modified<DATE_SUB(CURDATE(), INTERVAL %s DAY) """,
-		(auto_close_after_days),
-		as_dict=True,
-	)
+	table = frappe.qb.DocType("Opportunity")
+	opportunities = (
+		frappe.qb.from_(table)
+		.select(table.name)
+		.where(
+			(table.modified < (Now() - Interval(days=auto_close_after_days))) & (table.status == "Replied")
+		)
+	).run(pluck=True)
 
 	for opportunity in opportunities:
-		doc = frappe.get_doc("Opportunity", opportunity.get("name"))
+		doc = frappe.get_doc("Opportunity", opportunity)
 		doc.status = "Closed"
 		doc.flags.ignore_permissions = True
 		doc.flags.ignore_mandatory = True
diff --git a/erpnext/projects/doctype/project_update/project_update.py b/erpnext/projects/doctype/project_update/project_update.py
index 5a29fb6..175f787 100644
--- a/erpnext/projects/doctype/project_update/project_update.py
+++ b/erpnext/projects/doctype/project_update/project_update.py
@@ -28,7 +28,7 @@
 		for drafts in draft:
 			number_of_drafts = drafts[0]
 		update = frappe.db.sql(
-			"""SELECT name,date,time,progress,progress_details FROM `tabProject Update` WHERE `tabProject Update`.project = %s AND date = DATE_ADD(CURDATE(), INTERVAL -1 DAY);""",
+			"""SELECT name,date,time,progress,progress_details FROM `tabProject Update` WHERE `tabProject Update`.project = %s AND date = DATE_ADD(CURRENT_DATE, INTERVAL -1 DAY);""",
 			project_name,
 		)
 		email_sending(project_name, frequency, date_start, date_end, progress, number_of_drafts, update)
@@ -39,7 +39,7 @@
 ):
 
 	holiday = frappe.db.sql(
-		"""SELECT holiday_date FROM `tabHoliday` where holiday_date = CURDATE();"""
+		"""SELECT holiday_date FROM `tabHoliday` where holiday_date = CURRENT_DATE;"""
 	)
 	msg = (
 		"<p>Project Name: "
diff --git a/erpnext/selling/doctype/sales_order/test_sales_order.py b/erpnext/selling/doctype/sales_order/test_sales_order.py
index 96308f0..9e5d40b 100644
--- a/erpnext/selling/doctype/sales_order/test_sales_order.py
+++ b/erpnext/selling/doctype/sales_order/test_sales_order.py
@@ -644,7 +644,7 @@
 		else:
 			# update valid from
 			frappe.db.sql(
-				"""UPDATE `tabItem Tax` set valid_from = CURDATE()
+				"""UPDATE `tabItem Tax` set valid_from = CURRENT_DATE
 				where parent = %(item)s and item_tax_template = %(tax)s""",
 				{"item": item, "tax": tax_template},
 			)
diff --git a/erpnext/selling/report/inactive_customers/inactive_customers.py b/erpnext/selling/report/inactive_customers/inactive_customers.py
index 1b337fc..a166085 100644
--- a/erpnext/selling/report/inactive_customers/inactive_customers.py
+++ b/erpnext/selling/report/inactive_customers/inactive_customers.py
@@ -31,13 +31,13 @@
 def get_sales_details(doctype):
 	cond = """sum(so.base_net_total) as 'total_order_considered',
 			max(so.posting_date) as 'last_order_date',
-			DATEDIFF(CURDATE(), max(so.posting_date)) as 'days_since_last_order' """
+			DATEDIFF(CURRENT_DATE, max(so.posting_date)) as 'days_since_last_order' """
 	if doctype == "Sales Order":
 		cond = """sum(if(so.status = "Stopped",
 				so.base_net_total * so.per_delivered/100,
 				so.base_net_total)) as 'total_order_considered',
 			max(so.transaction_date) as 'last_order_date',
-			DATEDIFF(CURDATE(), max(so.transaction_date)) as 'days_since_last_order'"""
+			DATEDIFF(CURRENT_DATE, max(so.transaction_date)) as 'days_since_last_order'"""
 
 	return frappe.db.sql(
 		"""select
diff --git a/erpnext/selling/report/sales_order_analysis/sales_order_analysis.py b/erpnext/selling/report/sales_order_analysis/sales_order_analysis.py
index cc61594..720aa41 100644
--- a/erpnext/selling/report/sales_order_analysis/sales_order_analysis.py
+++ b/erpnext/selling/report/sales_order_analysis/sales_order_analysis.py
@@ -64,7 +64,7 @@
 			soi.delivery_date as delivery_date,
 			so.name as sales_order,
 			so.status, so.customer, soi.item_code,
-			DATEDIFF(CURDATE(), soi.delivery_date) as delay_days,
+			DATEDIFF(CURRENT_DATE, soi.delivery_date) as delay_days,
 			IF(so.status in ('Completed','To Bill'), 0, (SELECT delay_days)) as delay,
 			soi.qty, soi.delivered_qty,
 			(soi.qty - soi.delivered_qty) AS pending_qty,
diff --git a/erpnext/setup/doctype/email_digest/email_digest.py b/erpnext/setup/doctype/email_digest/email_digest.py
index cdfea77..42ba6ce 100644
--- a/erpnext/setup/doctype/email_digest/email_digest.py
+++ b/erpnext/setup/doctype/email_digest/email_digest.py
@@ -854,7 +854,7 @@
 
 		sql_po = """select {fields} from `tabPurchase Order Item`
 			left join `tabPurchase Order` on `tabPurchase Order`.name = `tabPurchase Order Item`.parent
-			where status<>'Closed' and `tabPurchase Order Item`.docstatus=1 and curdate() > `tabPurchase Order Item`.schedule_date
+			where status<>'Closed' and `tabPurchase Order Item`.docstatus=1 and CURRENT_DATE > `tabPurchase Order Item`.schedule_date
 			and received_qty < qty order by `tabPurchase Order Item`.parent DESC,
 			`tabPurchase Order Item`.schedule_date DESC""".format(
 			fields=fields_po
@@ -862,7 +862,7 @@
 
 		sql_poi = """select {fields} from `tabPurchase Order Item`
 			left join `tabPurchase Order` on `tabPurchase Order`.name = `tabPurchase Order Item`.parent
-			where status<>'Closed' and `tabPurchase Order Item`.docstatus=1 and curdate() > `tabPurchase Order Item`.schedule_date
+			where status<>'Closed' and `tabPurchase Order Item`.docstatus=1 and CURRENT_DATE > `tabPurchase Order Item`.schedule_date
 			and received_qty < qty order by `tabPurchase Order Item`.idx""".format(
 			fields=fields_poi
 		)
diff --git a/erpnext/stock/doctype/batch/batch.py b/erpnext/stock/doctype/batch/batch.py
index 559883f..52854a0 100644
--- a/erpnext/stock/doctype/batch/batch.py
+++ b/erpnext/stock/doctype/batch/batch.py
@@ -335,7 +335,7 @@
 				on (`tabBatch`.batch_id = `tabStock Ledger Entry`.batch_no )
 		where `tabStock Ledger Entry`.item_code = %s and `tabStock Ledger Entry`.warehouse = %s
 			and `tabStock Ledger Entry`.is_cancelled = 0
-			and (`tabBatch`.expiry_date >= CURDATE() or `tabBatch`.expiry_date IS NULL) {0}
+			and (`tabBatch`.expiry_date >= CURRENT_DATE or `tabBatch`.expiry_date IS NULL) {0}
 		group by batch_id
 		order by `tabBatch`.expiry_date ASC, `tabBatch`.creation ASC
 	""".format(
diff --git a/erpnext/support/doctype/issue/issue.py b/erpnext/support/doctype/issue/issue.py
index 08a06b1..7f3e0cf 100644
--- a/erpnext/support/doctype/issue/issue.py
+++ b/erpnext/support/doctype/issue/issue.py
@@ -11,6 +11,8 @@
 from frappe.email.inbox import link_communication_to_document
 from frappe.model.document import Document
 from frappe.model.mapper import get_mapped_doc
+from frappe.query_builder import Interval
+from frappe.query_builder.functions import Now
 from frappe.utils import date_diff, get_datetime, now_datetime, time_diff_in_seconds
 from frappe.utils.user import is_website_user
 
@@ -190,15 +192,17 @@
 		frappe.db.get_value("Support Settings", "Support Settings", "close_issue_after_days") or 7
 	)
 
-	issues = frappe.db.sql(
-		""" select name from tabIssue where status='Replied' and
-		modified<DATE_SUB(CURDATE(), INTERVAL %s DAY) """,
-		(auto_close_after_days),
-		as_dict=True,
-	)
+	table = frappe.qb.DocType("Issue")
+	issues = (
+		frappe.qb.from_(table)
+		.select(table.name)
+		.where(
+			(table.modified < (Now() - Interval(days=auto_close_after_days))) & (table.status == "Replied")
+		)
+	).run(pluck=True)
 
 	for issue in issues:
-		doc = frappe.get_doc("Issue", issue.get("name"))
+		doc = frappe.get_doc("Issue", issue)
 		doc.status = "Closed"
 		doc.flags.ignore_permissions = True
 		doc.flags.ignore_mandatory = True