MySQL SQL語句

用戶管理：

1、新建用戶：

CREATE USER name IDENTIFIED BY 'zhangsan'

2、更改密碼：

SET PASSWORD FOR name=PASSWORD('zhangsan123')

3、許可權管理：

//查看name用戶許可權

SHOW GRANTS FOR name

//給name用戶db_name資料庫的所有許可權

GRANT SELECT ON db_name.* TO name

//GRANT的反操作，去除許可權

REVOKE SELECT ON db_name.* TO name

資料庫操作：

1、說明：創建資料庫

CREATE DATABASE database-name

drop database dbname

create table tabname(col1 type1 [not null] [primary key],col2 type2 [not null],..)

create table tab_new like tab_old

create table tab_new as select col1,col2… from tab_old definition only

drop table tabname

Alter table tabname add column col type

Alter table tabname add primary key(col)

create [unique] index idxname on tabname(col….)

drop index idxname

create view viewname as select statement

drop view viewname

select * from table1 where 範圍

insert into table1(field1,field2) values(value1,value2)

delete from table1 where 範圍

update table1 set field1=value1 where 範圍

select * from table1 where field1 like ’%value1%’

select * from table1 order by field1,field2 [desc]

select count as totalcount from table1

select sum(field1) as sumvalue from table1

select avg(field1) as avgvalue from table1

select max(field1) as maxvalue from table1

select min(field1) as minvalue from table1

select a.a, a.b, a.c, b.c, b.d, b.f from a LEFT OUT JOIN b ON a.a = b.c

sp_renamedb 'old_name', 'new_name'

提升

select top 0 * into b from a

insert into b(a, b, c) select d,e,f from b

insert into b(a, b, c) select d,e,f from b in ‘具體資料庫’ where 條件

select a,b,c from a where a IN (select d from b ) 或者: select a,b,c from a where a IN (1,2,3)

select a.title,a.username,b.adddate from table a,(select max(adddate) adddate from table where table.title=a.title) b

select a.a, a.b, a.c, b.c, b.d, b.f from a LEFT OUT JOIN b ON a.a = b.c

select * from (SELECT a,b,c FROM a) T where t.a > 1

select * from table1 where time between time1 and time2

select a,b,c, from table1 where a not between 數值1 and 數值2

select * from table1 where a [not] in (‘值1’,’值2’,’值4’,’值6’)

delete from table1 where not exists ( select * from table2 where table1.field1=table2.field1 )

select * from a left inner join b on a.a=b.b right inner join c on a.a=c.c inner join d on a.a=d.d where .....

select * from 日程安排 where datediff('minute',f開始時間,getdate())>5

select top 10 b.* from (select top 20 主鍵欄位,排序欄位 from 表名 order by 排序欄位 desc) a,表名 b where b.主鍵欄位 = a.主鍵欄位 order by a.排序欄位

declare @start int,@end int
  @sql  nvarchar(600)
  set @sql=’select top’+str(@end-@start+1)+’+from T where rid not in(select top’+str(@str-1)+’Rid from T where Rid>-1)’
  exec sp_executesql @sql

select top 10 * form table1 where 範圍

select a,b,c from tablename ta where a=(select max(a) from tablename tb where tb.b=ta.b)

(select a from tableA ) except (select a from tableB) except (select a from tableC)

select top 10 * from tablename order by newid()

select newid()

delete from tablename where id not in (select max(id) from tablename group by col1,col2,...)

select distinct * into temp from tablename
delete from tablename
insert into tablename select * from temp

alter table tablename

add  column_b int identity(1,1)
delete from tablename where column_b not in(
select max(column_b)  from tablename group by column1,column2,...)
alter table tablename drop column column_b

select name from sysobjects where type='U' // U代表用戶

select name from syscolumns where id=object_id('TableName')

select type,sum(case vender when 'A' then pcs else 0 end),sum(case vender when 'C' then pcs else 0 end),sum(case vender when 'B' then pcs else 0 end) FROM tablename group by type

TRUNCATE TABLE table1

select top 5 * from (select top 15 * from table order by id asc) table_別名 order by id desc