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
|
DROP TABLE IF EXISTS t1, t2;
CREATE TABLE t1 (a <INT_COLUMN>, c <CHAR_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a,c) VALUES (1,'a'),(5,'z');
ALTER TABLE t1 ADD COLUMN b <INT_COLUMN>;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`c` char(8) DEFAULT NULL,
`b` int(11) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 ALTER COLUMN a SET DEFAULT '0';
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT '0',
`c` char(8) DEFAULT NULL,
`b` int(11) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 ALTER a DROP DEFAULT;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11),
`c` char(8) DEFAULT NULL,
`b` int(11) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 CHANGE COLUMN b b1 <CHAR_COLUMN> FIRST;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`b1` char(8) DEFAULT NULL,
`a` int(11),
`c` char(8) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 CHANGE b1 b <INT_COLUMN> AFTER c;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11),
`c` char(8) DEFAULT NULL,
`b` int(11) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 CHANGE b b <CHAR_COLUMN>;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11),
`c` char(8) DEFAULT NULL,
`b` char(8) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 MODIFY COLUMN b <INT_COLUMN>;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11),
`c` char(8) DEFAULT NULL,
`b` int(11) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 MODIFY COLUMN b <CHAR_COLUMN> FIRST;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`b` char(8) DEFAULT NULL,
`a` int(11),
`c` char(8) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 MODIFY COLUMN b <INT_COLUMN> AFTER a;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11),
`b` int(11) DEFAULT NULL,
`c` char(8) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 DROP COLUMN b;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11),
`c` char(8) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 RENAME TO t2;
SHOW CREATE TABLE t1;
ERROR 42S02: Table 'test.t1' doesn't exist
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11),
`c` char(8) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
DROP TABLE t2;
CREATE TABLE t1 (a <INT_COLUMN>, b <INT_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a,b) VALUES (1,5),(2,2),(4,3);
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` int(11) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
ALTER TABLE t1 ORDER BY b ASC, a DESC;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` int(11) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
SELECT a,b FROM t1;
a b
2 2
4 3
1 5
DROP TABLE t1;
CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>, c <CHAR_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS> CHARACTER SET latin1 COLLATE latin1_general_cs;
INSERT INTO t1 (a,b,c) VALUES (5,'z','t');
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` char(8) COLLATE latin1_general_cs DEFAULT NULL,
`c` char(8) COLLATE latin1_general_cs DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_general_cs
ALTER TABLE t1 CONVERT TO CHARACTER SET utf8;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` char(8) DEFAULT NULL,
`c` char(8) DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=utf8
ALTER TABLE t1 DEFAULT CHARACTER SET = latin1 COLLATE latin1_general_ci;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` char(8) CHARACTER SET utf8 DEFAULT NULL,
`c` char(8) CHARACTER SET utf8 DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci
ALTER TABLE t1 FORCE;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` char(8) CHARACTER SET utf8 DEFAULT NULL,
`c` char(8) CHARACTER SET utf8 DEFAULT NULL
) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci
DROP TABLE t1;
|
