-- 创建表语句 ORACLE:
create table _table_name(
column1 varchar2(10) primary key, column2 number(5) not null, memo varchar2(100) );
comment on column _table_name.column1 is '这是column1的注释'; SQLSERVER:
create table _table_name(
column1 varchar(10) primary key, column2 int not null, memo varchar(100) );
MYSQL:
create table `_table_name` (
`column1` VARCHAR(32) primary key COMMENT '注释', `column2` VARCHAR(30) not null COMMENT '注释', PRIMARY KEY (`column1`) -- 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 varchar2(505); alter table _table_name drop column column_name; SQLSERVER:
alter table _table_name add column_name VARCHAR(20);
alter table _table_name alter column column_name varchar(2000); alter table _table_name drop column column_name; MYSQL:
alter table _table_name add/modify column column_name varchar(2000); 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$cl2 on _table_name (column1_name,column2_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_NORECOMPUTE = 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_NORECOMPUTE = 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_list2');-- 可以插入多条记录
-- 修改表名 ORACLE:
alter table leave rename to Leave01; SQLSERVER:
EXEC sp_rename leave,leave01; MYSQL:
alter table `leave` RENAME to `leave01`; -- 删除表语句 ORACLE:
drop table table_name; SQLSERVER:
drop table table_name; MYSQL:
drop table table_name -- 删除所有表的语句 SQLSERVER:
exec sp_msforeachtable 'drop table ?'; -- 修改列名 SQLSERVER:
EXEC sp_rename '表名.列名','新列名','column'; -- 删除记录 ORACLE:
delete (from) tablename where _column_name=?;
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oracle,sqlserver,MySQL数据库语句对照表
