1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
DROP TABLE IF EXISTS t1,t2,t3,t2aA,t1Aa;
DROP DATABASE IF EXISTS `TEST_$1`;
DROP DATABASE IF EXISTS `test_$1`;
DROP DATABASE IF EXISTS mysqltest_LC2;
CREATE TABLE T1 (a int);
INSERT INTO T1 VALUES (1);
SHOW TABLES LIKE "T1";
Tables_in_test (T1)
T1
SHOW TABLES LIKE "t1";
Tables_in_test (t1)
T1
SHOW CREATE TABLE T1;
Table Create Table
T1 CREATE TABLE `T1` (
`a` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
RENAME TABLE T1 TO T2;
SHOW TABLES LIKE "T2";
Tables_in_test (T2)
T2
SELECT * FROM t2;
a
1
RENAME TABLE T2 TO t3;
SHOW TABLES LIKE "T3";
Tables_in_test (T3)
t3
RENAME TABLE T3 TO T1;
SHOW TABLES LIKE "T1";
Tables_in_test (T1)
T1
ALTER TABLE T1 add b int;
SHOW TABLES LIKE "T1";
Tables_in_test (T1)
T1
ALTER TABLE T1 RENAME T2;
SHOW TABLES LIKE "T2";
Tables_in_test (T2)
T2
LOCK TABLE T2 WRITE;
ALTER TABLE T2 drop b;
SHOW TABLES LIKE "T2";
Tables_in_test (T2)
T2
UNLOCK TABLES;
RENAME TABLE T2 TO T1;
SHOW TABLES LIKE "T1";
Tables_in_test (T1)
T1
SELECT * from T1;
a
1
DROP TABLE T1;
CREATE DATABASE `TEST_$1`;
SHOW DATABASES LIKE "TEST%";
Database (TEST%)
TEST_$1
DROP DATABASE `test_$1`;
CREATE TABLE T1 (a int) engine=innodb;
INSERT INTO T1 VALUES (1);
SHOW TABLES LIKE "T1";
Tables_in_test (T1)
T1
SHOW TABLES LIKE "t1";
Tables_in_test (t1)
T1
SHOW CREATE TABLE T1;
Table Create Table
T1 CREATE TABLE `T1` (
`a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
RENAME TABLE T1 TO T2;
SHOW TABLES LIKE "T2";
Tables_in_test (T2)
T2
SELECT * FROM t2;
a
1
RENAME TABLE T2 TO t3;
SHOW TABLES LIKE "T3";
Tables_in_test (T3)
t3
RENAME TABLE T3 TO T1;
SHOW TABLES LIKE "T1";
Tables_in_test (T1)
T1
ALTER TABLE T1 add b int;
SHOW TABLES LIKE "T1";
Tables_in_test (T1)
T1
ALTER TABLE T1 RENAME T2;
SHOW TABLES LIKE "T2";
Tables_in_test (T2)
T2
LOCK TABLE T2 WRITE;
ALTER TABLE T2 drop b;
SHOW TABLES LIKE "T2";
Tables_in_test (T2)
T2
UNLOCK TABLES;
RENAME TABLE T2 TO T1;
SHOW TABLES LIKE "T1";
Tables_in_test (T1)
T1
SELECT * from T1;
a
1
DROP TABLE T1;
create table T1 (EVENT_ID int auto_increment primary key, LOCATION char(20));
insert into T1 values (NULL,"Mic-4"),(NULL,"Mic-5"),(NULL,"Mic-6");
SELECT LOCATION FROM T1 WHERE EVENT_ID=2 UNION ALL SELECT LOCATION FROM T1 WHERE EVENT_ID=3;
LOCATION
Mic-5
Mic-6
SELECT LOCATION FROM T1 WHERE EVENT_ID=2 UNION ALL SELECT LOCATION FROM T1 WHERE EVENT_ID=3;
LOCATION
Mic-5
Mic-6
SELECT LOCATION FROM T1 WHERE EVENT_ID=2 UNION ALL SELECT LOCATION FROM T1 WHERE EVENT_ID=3;
LOCATION
Mic-5
Mic-6
drop table T1;
create table T1 (A int);
alter table T1 add index (A);
show tables like 'T1%';
Tables_in_test (T1%)
T1
alter table t1 add index (A);
show tables like 't1%';
Tables_in_test (t1%)
t1
drop table t1;
create temporary table T1(a int(11), b varchar(8));
insert into T1 values (1, 'abc');
select * from T1;
a b
1 abc
alter table T1 add index (a);
select * from T1;
a b
1 abc
drop table T1;
create database mysqltest_LC2;
use mysqltest_LC2;
create table myUC (i int);
insert into myUC values (1),(2),(3);
select * from myUC;
i
1
2
3
use test;
drop database mysqltest_LC2;
create database mysqltest_LC2;
use mysqltest_LC2;
create table myUC (i int);
select * from myUC;
i
use test;
drop database mysqltest_LC2;
create table t2aA (col1 int);
create table t1Aa (col1 int);
select t1Aa.col1 from t1aA,t2Aa where t1Aa.col1 = t2aA.col1;
col1
drop table t2aA, t1Aa;
create database mysqltest_LC2;
use mysqltest_LC2;
create table myUC (i int);
select TABLE_SCHEMA,TABLE_NAME FROM information_schema.TABLES
where TABLE_SCHEMA ='mysqltest_LC2';
TABLE_SCHEMA TABLE_NAME
mysqltest_LC2 myUC
use test;
drop database mysqltest_LC2;
|
