Openquery with variables in datetime using like clause with linked server

问题

Everytime I execute this query I get this error: The data types varchar and varchar are incompatible in the modulo operator. Asking for your help. Thanks!

DECLARE @date datetime, @SQL NVARCHAR(MAX);

SET @date = '2019';

SET @SQL = 'SELECT * FROM OPENQUERY(LINK2, ''SELECT * FROM wordpress.wp_users WHERE user_registered LIKE '''%' +@date+ '%''''')';

EXEC sp_executesql @SQL;

回答1:

you can be varchar(4) because you are setting it as string. then use datepart()

DECLARE @date varchar(4), @SQL NVARCHAR(MAX);

SET @date = '2019';

SET @SQL = 'SELECT * FROM OPENQUERY(LINK2, ''SELECT * FROM wordpress.wp_users WHERE DATEPART(yy, user_registered) LIKE ''''%' +@date+ '%'''''')';

EXEC sp_executesql @SQL;

来源：https://stackoverflow.com/questions/57722978/openquery-with-variables-in-datetime-using-like-clause-with-linked-server