lowercase_table.result
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
源码类别:
MySQL数据库
开发平台:
Visual C++
- drop table if exists t1,t2,t3,t4;
- drop table if exists t0,t5,t6,t7,t8,t9;
- drop database if exists mysqltest;
- create table T1 (id int primary key, Word varchar(40) not null, Index(Word));
- create table t4 (id int primary key, Word varchar(40) not null);
- INSERT INTO T1 VALUES (1, 'a'), (2, 'b'), (3, 'c');
- INSERT INTO T4 VALUES(1,'match');
- SELECT * FROM t1;
- id Word
- 1 a
- 2 b
- 3 c
- SELECT T1.id from T1 LIMIT 1;
- id
- 1
- SELECT T2.id from t1 as T2 LIMIT 1;
- id
- 1
- SELECT * from t1 left join t4 on (test.t1.id= TEST.t4.id) where TEST.t1.id >= test.t4.id;
- id Word id Word
- 1 a 1 match
- SELECT T2.id from t1 as t2 LIMIT 1;
- id
- 1
- RENAME TABLE T1 TO T2;
- ALTER TABLE T2 ADD new_col int not null;
- ALTER TABLE T2 RENAME T3;
- show tables like 't_';
- Tables_in_test (t_)
- t3
- t4
- drop table t3,t4;
- create table t1 (a int);
- select count(*) from T1;
- count(*)
- 0
- select count(*) from t1;
- count(*)
- 0
- select count(T1.a) from t1;
- count(T1.a)
- 0
- select count(bags.a) from t1 as Bags;
- count(bags.a)
- 0
- drop table t1;
- create database mysqltest;
- use MYSQLTEST;
- create table t1 (a int);
- select T1.a from MYSQLTEST.T1;
- a
- select t1.a from MYSQLTEST.T1;
- a
- select mysqltest.t1.* from MYSQLTEST.t1;
- a
- select MYSQLTEST.t1.* from MYSQLTEST.t1;
- a
- select MYSQLTEST.T1.* from MYSQLTEST.T1;
- a
- select MYSQLTEST.T1.* from T1;
- a
- alter table t1 rename to T1;
- select MYSQLTEST.t1.* from MYSQLTEST.t1;
- a
- drop database mysqltest;
- use test;
- create table t1 (a int);
- create table t2 (a int);
- delete p1.*,P2.* from t1 as p1, t2 as p2 where p1.a=P2.a;
- delete P1.*,p2.* from t1 as P1, t2 as P2 where P1.a=p2.a;
- update t1 as p1, t2 as p2 SET p1.a=1,P2.a=1 where p1.a=P2.a;
- update t1 as P1, t2 as P2 SET P1.a=1,p2.a=1 where P1.a=p2.a;
- drop table t1,t2;
- create table t1 (a int);
- create table t2 (a int);
- select * from t1 c, t2 C;
- ERROR 42000: Not unique table/alias: 'C'
- select C.a, c.a from t1 c, t2 C;
- ERROR 42000: Not unique table/alias: 'C'
- drop table t1, t2;
- create table t1 (a int);
- create table t2 like T1;
- drop table t1, t2;
- show tables;
- Tables_in_test