sql中判斷是否存在 數據庫、表、存儲過程、函數

判斷數據庫是否存在
if exists (select * from sys.databases where name = '數據庫名')
drop database [數據庫名]
判斷表是否存在
if exists (select * from sysobjects where id = object_id(N'[表名]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [表名]

判斷存儲過程是否存在
if exists (select * from sysobjects where id = object_id(N'[存儲過程名]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [存儲過程名]

判斷函數是否存在
IF OBJECT_ID (N'函數名') IS NOT NULL
DROP FUNCTION dnt_split

判斷數據庫是否開啟了全文搜索
select databaseproperty('數據庫名','isfulltextenabled')

判斷全文目錄是否存在
select * from sysfulltextcatalogs where name ='全文目錄名稱'