創(chuàng)建數(shù)據(jù)庫常用SQL語句

/* 1、新建數(shù)據(jù)庫 DataBaseName 2、執(zhí)行下面的sql語句添加表 3、執(zhí)行下面的sql語句添加數(shù)據(jù) 3、給主鍵添加自增類型 5、添加主鍵 4、添加外鍵關(guān)系 */use DataBaseName; /*刪除已創(chuàng)建的外鍵和索引：先執(zhí)行下面這句sql，復(fù)雜執(zhí)行結(jié)果，執(zhí)行，在執(zhí)行下面的sql select 'IF EXISTS(Select 1 from sys.foreign_keys Where name= '''+fk.name+''') ALTER TABLE ' + o.name + ' DROP CONSTRAINT ' + fk.name + ';' AS Command from sys.foreign_keys fk JOIN sys.all_objects o ON (fk.parent_object_id = o.object_id);select 'IF EXISTS (Select 1 from sys.indexes Where name= '''+ix.name+''') DROP INDEX '+o.name+'.' + ix.name + ';' AS Command from sys.indexes ix JOIN sys.all_objects o ON (ix.object_id = o.object_id) where ix.name like 'IX_%'; */IF EXISTS(Select 1 From Sysobjects Where Name='TableName') DROP table TableName; CREATE TABLE TableName (id int IDENTITY(1,1) NOT NULL,title varchar (30) NULL ,summary varchar (MAX) NULL , remark text NULL , money numeric(18,2) NULL ,state int NULL ,user_id varchar (60) NULL ,sort_no varchar (60) NULL ,upd_time datetime,add_time datetime ); /*INSERT INTO 當插入自增主鍵時，需要開啟和關(guān)閉*/ set identity_insert TableName on; INSERT INTO TableName (id,title,summary,remark,money,state,user_id) VALUES (1,'標題','簡介','備注','99.90',1,'xiaoming123'); set identity_insert TableName off;/*增加主鍵*/ ALTER TABLE TableName ADD CONSTRAINT PK_TableName PRIMARY KEY (id); /* DROP DATABASE 數(shù)據(jù)庫名; DROP TABLE 表名稱; TRUNCATE TABLE表名稱; DELETE FROM 表名稱 WHERE列名稱 = 值 ; ALTER TABLE tb ADD CONSTRAINT PK_id PRIMARY KEY (id); ALTER TABLE tb DROP CONSTRAINT PK_id; ALTER TABLE tb1 ADD CONSTRAINT FK_tb1_tb2 FOREIGN KEY(tb1_id) REFERENCES tb2(tb2_id); ALTER TABLE tb ADD 列名 類型 null; ALTER TABLE tb ALTER COLUMN 列名 類型 not null; CREATE NONCLUSTERED INDEX IX_索引名 ON 表名(索引列名); [創(chuàng)建索引](https://blog.csdn.net/hanxin0311/article/details/116144697) *//*創(chuàng)建視圖*/ IF EXISTS(SELECT 1 FROM sys.views WHERE name='view_TableName') DROP VIEW view_TableName GO CREATE VIEW view_TableName AS SELECT CONVERT(varchar(100), add_time, 23) + '-' + CONVERT(varchar(32), user_id) AS id，CONVERT(varchar(100), add_time, 23) as add_time ,sum(money) as total FROM TableName GROUP BY CONVERT(varchar(100), add_time, 23) ,user_id GO

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