知识大全 oracle,sqlserver,MySQL数据库语句对照表

Posted 2022-07-15 索引

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　　创建表语句 ORACLE: create table _table_name( column varchar ( ) primary key column number( ) not null memo varchar ( ) ); ment on column _table_name column is 这是column 的注释 ; SQLSERVER: create table _table_name( column varchar( ) primary key column int not null memo varchar( ) ); MYSQL: create table `_table_name` ( `column ` VARCHAR( ) primary key MENT 注释 `column ` VARCHAR( ) not null MENT 注释 PRIMARY KEY (`column `) 主键定义也可放在此处 )ENGINE=InnoDB DEFAULT CHARSET=gbk;

　　修改字段语句 ORACLE: alter table _table_name add/modify column_name varchar ( ); alter table _table_name drop column column_name; SQLSERVER: alter table _table_name add column_name VARCHAR( ); alter table _table_name alter column column_name varchar( ); alter table _table_name drop column column_name; MYSQL: alter table _table_name add/modify column column_name varchar( ); alter table _table_name drop `column_name`;

　　创建删除索引语句索引只能删除重建不能修改 ORACLE: 主键索引 alter table _table_name add constraint index_name primary key (column_name) using index tablespace URMSPK; 普通列索引 create index index_name$cl on _table_name (column _name column _name DESC) tablespace URMSIDX; 删除索引 drop index index_name; SQLSERVER: 主键索引 Alter table _table_name add primary key(column_name); alter table _table_name add constraint index_name primary key CLUSTERED (column_name) WITH ( PAD_INDEX = OFF IGNORE_DUP_KEY = OFF STATISTICS_NOREPUTE = OFF ALLOW_ROW_LOCKS = ON ALLOW_PAGE_LOCKS = ON) ON URMSPK go 普通列索引非唯一索引需要去掉 UNIQUE NONCLUSTERED 关键字 CREATE UNIQUE NONCLUSTERED INDEX [index_name] ON [_table_name] ([ORGRANGE] [SHOWORDER] DESC) WITH ( PAD_INDEX = OFF IGNORE_DUP_KEY = OFF DROP_EXISTING = OFF STATISTICS_NOREPUTE = OFF SORT_IN_TEMPDB = OFF ONLINE = OFF ALLOW_ROW_LOCKS = ON ALLOW_PAGE_LOCKS = ON) ON [URMSIDX] GO 删除索引 drop index _table_name idxname; MYSQL: 普通索引 ALTER TABLE _table_name ADD INDEX index_name (APPID CREATEDATE DESC); 唯一索引 ALTER TABLE _table_name ADD UNIQUE index_name (column_list); 主键索引 ALTER TABLE _table_name ADD PRIMARY KEY index_name (column_list);

　　删除索引 alter table _table_name drop index index_name;

　　插入语句 ORACLE: insert into _table_name (column_list) values ( value_list ); SQLSERVER: insert into _table_name (column_list) values ( value_list ); MYSQL: insert into UMFRAMESET (`column_list`) values ( value_list ) ( value_list ); 可以插入多条记录

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