Mysql getting certian day's date with date range (syntax error) - mysql

Question

This is my full code but when i start it,
DECLARE #StartDateTime DATETIME
DECLARE #EndDateTime DATETIME
SET #StartDateTime = '2022-04-01'
SET #EndDateTime = '2022-04-29';
WITH DateRange(Dates, DateWD) AS
(
SELECT #StartDateTime as Date, DATEPART(WEEKDAY, #StartDateTime)
UNION ALL
SELECT DATEADD(d,1,Dates), DATEPART(WEEKDAY, DATEADD(d,1,Dates))
FROM DateRange
WHERE Dates < #EndDateTime
)
SELECT Dates, DateWD
FROM DateRange
WHERE DATEWD NOT IN(1,7) AND Dates NOT IN(
SELECT (HOLI_YEAR + '-' + HOLI_MONTH + '-' + HOLI_DAY) AS DATE
FROM TB_HOLIDAY_CODE
OPTION (MAXRECURSION 0)
This error cames out.
I want to show 2022, april's date list except SUNDAY and SATURDAY
eg) start date is 2022-04-01
end date is 2022-04-30
so result come out ->
Dates
DateWD
2022-04-01
(FRI)
2022-04-04
(MON)
2022-04-05
(TUE)
2022-04-06
(WED)
2022-04-07
(THU)
2022-04-08
(FRI)
2022-04-11
(MON)
....
...
How can i fix this code? help me please. Thank you
*** I will not use table. Because i don't have table, and i want to use only SQL QUERY.

Answer 1

The syntax error is because that example is written for SQL Server, not MySQL. It needs a few adjustments to work with MySQL 8.x:
You don't need to DECLARE the user defined variables. Just use SET to both declare and assign the variable values
DATEADD() is a SQL Server function. The MySQL equivalent is DATE_ADD(date,INTERVAL expr unit)
DATEPART(weekday,...) is a SQL Server function. For MySQL, try DAYOFWEEK(date)
Lastly, use the keyword RECURSIVE with the CTE. From the docs:
A common table expression is recursive if its subquery refers to its
own name. The RECURSIVE keyword must be included if any CTE in the
WITH clause is recursive.
SQL
SET #StartDateTime = '2022-04-01';
SET #EndDateTime = '2022-04-29';
WITH RECURSIVE DateRange(Dates, DateWD) AS
(
SELECT #StartDateTime, DayOfWeek(#StartDateTime)
UNION ALL
SELECT DATE_ADD(Dates, INTERVAL 1 DAY), DayOfWeek(DATE_ADD(Dates, INTERVAL 1 DAY))
FROM DateRange
WHERE Dates < #EndDateTime
)
SELECT *
FROM DateRange
WHERE DateWDNOT IN(1,7)
Result:
Dates
DateWD
2022-04-01
6
2022-04-04
2
2022-04-05
3
2022-04-06
4
2022-04-07
5
2022-04-08
6
2022-04-11
2
2022-04-12
3
2022-04-13
4
2022-04-14
5
2022-04-15
6
2022-04-18
2
2022-04-19
3
2022-04-20
4
2022-04-21
5
2022-04-22
6
2022-04-25
2
2022-04-26
3
2022-04-27
4
2022-04-28
5
2022-04-29
6
db<>fiddle here