sql 检查表或列存在

Posted 2021-05-13

IF EXISTS(SELECT 1 FROM sys.columns 
          WHERE Name = N'columnName'
          AND Object_ID = Object_ID(N'schemaName.tableName'))
BEGIN
    -- Column Exists
END

IF COL_LENGTH('schemaName.tableName', 'columnName') IS NOT NULL
BEGIN
    -- Column Exists
END

IF EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = N'Customers')
BEGIN
    PRINT 'Table Exists'
END

IF OBJECT_ID(N'dbo.Customers', N'U') IS NOT NULL
BEGIN
    PRINT 'Table Exists'
END