Transact-SQL 中使用嵌套 TRY...CATCH

DECLARE @a INT = 9,
@b INT

BEGIN TRY
BEGIN TRY
SET @a = @a / 0
END TRY

BEGIN CATCH
SET @b = 1
END CATCH

SELECT '内部第1个CATCH:' + Cast(@b AS VARCHAR(20))

BEGIN TRY
SET @a = @a / 0
END TRY

BEGIN CATCH
SET @b = @b + 5
END CATCH

SELECT '内部第2个CATCH:' + Cast(@b AS VARCHAR(20))
END TRY

BEGIN CATCH
SELECT '最外CATCH:' + Cast(@b AS VARCHAR(20))
END CATCH