sql 检查对象是否存在

Posted 2021-05-13

-- Check if Table Exists
IF (EXISTS (SELECT * 
                 FROM INFORMATION_SCHEMA.TABLES 
                 WHERE TABLE_SCHEMA = 'Schema' 
                 AND  TABLE_NAME = 'Table'))
BEGIN
    PRINT 'TABLE EXISTS'
END

-- Check if Table NOT Exists
IF (NOT EXISTS (SELECT * 
                 FROM INFORMATION_SCHEMA.TABLES 
                 WHERE TABLE_SCHEMA = 'Schema' 
                 AND  TABLE_NAME = 'Table'))
BEGIN
    PRINT 'TABLE NOT EXISTS'
END

-- Check if Column Exists
IF COL_LENGTH('Schema.Table', 'Column') IS NOT NULL
BEGIN
    PRINT 'COLUMN EXISTS'
END

-- Check if Column NOT Exists
IF COL_LENGTH('Schema.Table', 'Column') IS NULL
BEGIN
    PRINT 'COLUMN NOT EXISTS'
END