How do I create a SQL Function to return a BIT?

问题

I am using this script below to create a function but I get an error in the messages log:

CREATE FUNCTION [dbo].[MyFunction] () RETURNS BIT AS RETURN CAST(1 AS BIT) 

Msg 102, Level 15, State 31, Procedure MyFunction, Line 1 Incorrect syntax near 'RETURN'.

It works when I change this to return a table:

CREATE FUNCTION [dbo].[MyFunction] () RETURNS TABLE AS RETURN (SELECT 1 [1])

so I am not sure what is wrong. Why does this work for a table but not a bit?

回答1:

Change your syntax to include a begin and end like so:

CREATE FUNCTION [dbo].[MyFunction]() RETURNS bit AS begin RETURN CAST(1 AS bit) end

来源：https://stackoverflow.com/questions/17028961/how-do-i-create-a-sql-function-to-return-a-bit