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drop table if exists t1,t2,t3;
SET SQL_WARNINGS=1;
CREATE TABLE t1 (
auto int(5) unsigned NOT NULL auto_increment,
string char(10) default "hello",
tiny tinyint(4) DEFAULT '0' NOT NULL ,
short smallint(6) DEFAULT '1' NOT NULL ,
medium mediumint(8) DEFAULT '0' NOT NULL,
long_int int(11) DEFAULT '0' NOT NULL,
longlong bigint(13) DEFAULT '0' NOT NULL,
real_float float(13,1) DEFAULT 0.0 NOT NULL,
real_double double(16,4),
utiny tinyint(3) unsigned DEFAULT '0' NOT NULL,
ushort smallint(5) unsigned zerofill DEFAULT '00000' NOT NULL,
umedium mediumint(8) unsigned DEFAULT '0' NOT NULL,
ulong int(11) unsigned DEFAULT '0' NOT NULL,
ulonglong bigint(13) unsigned DEFAULT '0' NOT NULL,
time_stamp timestamp,
date_field date,
time_field time,
date_time datetime,
blob_col blob,
tinyblob_col tinyblob,
mediumblob_col mediumblob not null default '',
longblob_col longblob not null default '',
options enum('one','two','tree') not null ,
flags set('one','two','tree') not null default '',
PRIMARY KEY (auto),
KEY (utiny),
KEY (tiny),
KEY (short),
KEY any_name (medium),
KEY (longlong),
KEY (real_float),
KEY (ushort),
KEY (umedium),
KEY (ulong),
KEY (ulonglong,ulong),
KEY (options,flags)
);
Warnings:
Warning 1101 BLOB/TEXT column 'mediumblob_col' can't have a default value
Warning 1101 BLOB/TEXT column 'longblob_col' can't have a default value
show full fields from t1;
Field Type Collation Null Key Default Extra Privileges Comment
auto int(5) unsigned NULL NO PRI NULL auto_increment #
string char(10) latin1_swedish_ci YES hello #
tiny tinyint(4) NULL NO MUL 0 #
short smallint(6) NULL NO MUL 1 #
medium mediumint(8) NULL NO MUL 0 #
long_int int(11) NULL NO 0 #
longlong bigint(13) NULL NO MUL 0 #
real_float float(13,1) NULL NO MUL 0.0 #
real_double double(16,4) NULL YES NULL #
utiny tinyint(3) unsigned NULL NO MUL 0 #
ushort smallint(5) unsigned zerofill NULL NO MUL 00000 #
umedium mediumint(8) unsigned NULL NO MUL 0 #
ulong int(11) unsigned NULL NO MUL 0 #
ulonglong bigint(13) unsigned NULL NO MUL 0 #
time_stamp timestamp NULL NO CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP #
date_field date NULL YES NULL #
time_field time NULL YES NULL #
date_time datetime NULL YES NULL #
blob_col blob NULL YES NULL #
tinyblob_col tinyblob NULL YES NULL #
mediumblob_col mediumblob NULL NO NULL #
longblob_col longblob NULL NO NULL #
options enum('one','two','tree') latin1_swedish_ci NO MUL NULL #
flags set('one','two','tree') latin1_swedish_ci NO #
show keys from t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
t1 0 PRIMARY 1 auto A 0 NULL NULL BTREE
t1 1 utiny 1 utiny A NULL NULL NULL BTREE
t1 1 tiny 1 tiny A NULL NULL NULL BTREE
t1 1 short 1 short A NULL NULL NULL BTREE
t1 1 any_name 1 medium A NULL NULL NULL BTREE
t1 1 longlong 1 longlong A NULL NULL NULL BTREE
t1 1 real_float 1 real_float A NULL NULL NULL BTREE
t1 1 ushort 1 ushort A NULL NULL NULL BTREE
t1 1 umedium 1 umedium A NULL NULL NULL BTREE
t1 1 ulong 1 ulong A NULL NULL NULL BTREE
t1 1 ulonglong 1 ulonglong A NULL NULL NULL BTREE
t1 1 ulonglong 2 ulong A NULL NULL NULL BTREE
t1 1 options 1 options A NULL NULL NULL BTREE
t1 1 options 2 flags A NULL NULL NULL BTREE
CREATE UNIQUE INDEX test on t1 ( auto ) ;
CREATE INDEX test2 on t1 ( ulonglong,ulong) ;
Warnings:
Note 1831 Duplicate index 'test2' defined on the table 'test.t1'. This is deprecated and will be disallowed in a future release.
CREATE INDEX test3 on t1 ( medium ) ;
Warnings:
Note 1831 Duplicate index 'test3' defined on the table 'test.t1'. This is deprecated and will be disallowed in a future release.
DROP INDEX test ON t1;
insert into t1 values (10, 1,1,1,1,1,1,1,1,1,1,1,1,1,NULL,0,0,0,1,1,1,1,'one','one');
insert into t1 values (NULL,2,2,2,2,2,2,2,2,2,2,2,2,2,NULL,NULL,NULL,NULL,NULL,NULL,2,2,'two','two,one');
insert into t1 values (0,1/3,3,3,3,3,3,3,3,3,3,3,3,3,NULL,'19970303','10:10:10','19970303101010','','','','3',3,3);
Warnings:
Warning 1265 Data truncated for column 'string' at row 1
insert into t1 values (0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,NULL,19970807,080706,19970403090807,-1,-1,-1,'-1',-1,-1);
Warnings:
Warning 1264 Out of range value for column 'utiny' at row 1
Warning 1264 Out of range value for column 'ushort' at row 1
Warning 1264 Out of range value for column 'umedium' at row 1
Warning 1264 Out of range value for column 'ulong' at row 1
Warning 1264 Out of range value for column 'ulonglong' at row 1
Warning 1265 Data truncated for column 'options' at row 1
Warning 1265 Data truncated for column 'flags' at row 1
insert into t1 values (0,-4294967295,-4294967295,-4294967295,-4294967295,-4294967295,-4294967295,-4294967295,-4294967295,-4294967295,-4294967295,-4294967295,-4294967295,-4294967295,NULL,0,0,0,-4294967295,-4294967295,-4294967295,'-4294967295',0,"one,two,tree");
Warnings:
Warning 1265 Data truncated for column 'string' at row 1
Warning 1264 Out of range value for column 'tiny' at row 1
Warning 1264 Out of range value for column 'short' at row 1
Warning 1264 Out of range value for column 'medium' at row 1
Warning 1264 Out of range value for column 'long_int' at row 1
Warning 1264 Out of range value for column 'utiny' at row 1
Warning 1264 Out of range value for column 'ushort' at row 1
Warning 1264 Out of range value for column 'umedium' at row 1
Warning 1264 Out of range value for column 'ulong' at row 1
Warning 1264 Out of range value for column 'ulonglong' at row 1
Warning 1265 Data truncated for column 'options' at row 1
insert into t1 values (0,4294967295,4294967295,4294967295,4294967295,4294967295,4294967295,4294967295,4294967295,4294967295,4294967295,4294967295,4294967295,4294967295,NULL,0,0,0,4294967295,4294967295,4294967295,'4294967295',0,0);
Warnings:
Warning 1264 Out of range value for column 'tiny' at row 1
Warning 1264 Out of range value for column 'short' at row 1
Warning 1264 Out of range value for column 'medium' at row 1
Warning 1264 Out of range value for column 'long_int' at row 1
Warning 1264 Out of range value for column 'utiny' at row 1
Warning 1264 Out of range value for column 'ushort' at row 1
Warning 1264 Out of range value for column 'umedium' at row 1
Warning 1265 Data truncated for column 'options' at row 1
insert into t1 (tiny) values (1);
select auto,string,tiny,short,medium,long_int,longlong,real_float,real_double,utiny,ushort,umedium,ulong,ulonglong,mod(floor(time_stamp/1000000),1000000)-mod(curdate(),1000000),date_field,time_field,date_time,blob_col,tinyblob_col,mediumblob_col,longblob_col from t1;
auto string tiny short medium long_int longlong real_float real_double utiny ushort umedium ulong ulonglong mod(floor(time_stamp/1000000),1000000)-mod(curdate(),1000000) date_field time_field date_time blob_col tinyblob_col mediumblob_col longblob_col
10 1 1 1 1 1 1 1.0 1.0000 1 00001 1 1 1 0 0000-00-00 00:00:00 0000-00-00 00:00:00 1 1 1 1
11 2 2 2 2 2 2 2.0 2.0000 2 00002 2 2 2 0 NULL NULL NULL NULL NULL 2 2
12 0.33333333 3 3 3 3 3 3.0 3.0000 3 00003 3 3 3 0 1997-03-03 10:10:10 1997-03-03 10:10:10 3
13 -1 -1 -1 -1 -1 -1 -1.0 -1.0000 0 00000 0 0 0 0 1997-08-07 08:07:06 1997-04-03 09:08:07 -1 -1 -1 -1
14 -429496729 -128 -32768 -8388608 -2147483648 -4294967295 -4294967296.0 -4294967295.0000 0 00000 0 0 0 0 0000-00-00 00:00:00 0000-00-00 00:00:00 -4294967295 -4294967295 -4294967295 -4294967295
15 4294967295 127 32767 8388607 2147483647 4294967295 4294967296.0 4294967295.0000 255 65535 16777215 4294967295 4294967295 0 0000-00-00 00:00:00 0000-00-00 00:00:00 4294967295 4294967295 4294967295 4294967295
16 hello 1 1 0 0 0 0.0 NULL 0 00000 0 0 0 0 NULL NULL NULL NULL NULL
ALTER TABLE t1
add new_field char(10) default "new" not null,
change blob_col new_blob_col varchar(20),
change date_field date_field char(10),
alter column string set default "newdefault",
alter short drop default,
DROP INDEX utiny,
DROP INDEX ushort,
DROP PRIMARY KEY,
DROP FOREIGN KEY any_name,
ADD INDEX (auto);
LOCK TABLES t1 WRITE;
ALTER TABLE t1
RENAME as t2,
DROP longblob_col;
UNLOCK TABLES;
ALTER TABLE t2 rename as t3;
LOCK TABLES t3 WRITE ;
ALTER TABLE t3 rename as t1;
UNLOCK TABLES;
select auto,new_field,new_blob_col,date_field from t1 ;
auto new_field new_blob_col date_field
10 new 1 0000-00-00
11 new NULL NULL
12 new 1997-03-03
13 new -1 1997-08-07
14 new -4294967295 0000-00-00
15 new 4294967295 0000-00-00
16 new NULL NULL
CREATE TABLE t2 (
auto int(5) unsigned NOT NULL auto_increment,
string char(20),
mediumblob_col mediumblob not null,
new_field char(2),
PRIMARY KEY (auto)
);
INSERT INTO t2 (string,mediumblob_col,new_field) SELECT string,mediumblob_col,new_field from t1 where auto > 10;
Warnings:
Warning 1265 Data truncated for column 'new_field' at row 2
Warning 1265 Data truncated for column 'new_field' at row 3
Warning 1265 Data truncated for column 'new_field' at row 4
Warning 1265 Data truncated for column 'new_field' at row 5
Warning 1265 Data truncated for column 'new_field' at row 6
Warning 1265 Data truncated for column 'new_field' at row 7
select * from t2;
auto string mediumblob_col new_field
1 2 2 ne
2 0.33333333 ne
3 -1 -1 ne
4 -429496729 -4294967295 ne
5 4294967295 4294967295 ne
6 hello ne
select distinct flags from t1;
flags
one,two,tree
one
one,two
select flags from t1 where find_in_set("two",flags)>0;
flags
one,two,tree
one,two,tree
one,two
one,two
select flags from t1 where find_in_set("unknown",flags)>0;
flags
select options,flags from t1 where options="ONE" and flags="ONE";
options flags
one one
select options,flags from t1 where options="one" and flags="one";
options flags
one one
drop table t2;
create table t2 select * from t1;
update t2 set string="changed" where auto=16;
show full columns from t1;
Field Type Collation Null Key Default Extra Privileges Comment
auto int(5) unsigned NULL NO MUL NULL auto_increment #
string char(10) latin1_swedish_ci YES newdefault #
tiny tinyint(4) NULL NO MUL 0 #
short smallint(6) NULL NO MUL NULL #
medium mediumint(8) NULL NO MUL 0 #
long_int int(11) NULL NO 0 #
longlong bigint(13) NULL NO MUL 0 #
real_float float(13,1) NULL NO MUL 0.0 #
real_double double(16,4) NULL YES NULL #
utiny tinyint(3) unsigned NULL NO 0 #
ushort smallint(5) unsigned zerofill NULL NO 00000 #
umedium mediumint(8) unsigned NULL NO MUL 0 #
ulong int(11) unsigned NULL NO MUL 0 #
ulonglong bigint(13) unsigned NULL NO MUL 0 #
time_stamp timestamp NULL NO CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP #
date_field char(10) latin1_swedish_ci YES NULL #
time_field time NULL YES NULL #
date_time datetime NULL YES NULL #
new_blob_col varchar(20) latin1_swedish_ci YES NULL #
tinyblob_col tinyblob NULL YES NULL #
mediumblob_col mediumblob NULL NO NULL #
options enum('one','two','tree') latin1_swedish_ci NO MUL NULL #
flags set('one','two','tree') latin1_swedish_ci NO #
new_field char(10) latin1_swedish_ci NO new #
show full columns from t2;
Field Type Collation Null Key Default Extra Privileges Comment
auto int(5) unsigned NULL NO 0 #
string char(10) latin1_swedish_ci YES newdefault #
tiny tinyint(4) NULL NO 0 #
short smallint(6) NULL NO NULL #
medium mediumint(8) NULL NO 0 #
long_int int(11) NULL NO 0 #
longlong bigint(13) NULL NO 0 #
real_float float(13,1) NULL NO 0.0 #
real_double double(16,4) NULL YES NULL #
utiny tinyint(3) unsigned NULL NO 0 #
ushort smallint(5) unsigned zerofill NULL NO 00000 #
umedium mediumint(8) unsigned NULL NO 0 #
ulong int(11) unsigned NULL NO 0 #
ulonglong bigint(13) unsigned NULL NO 0 #
time_stamp timestamp NULL NO CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP #
date_field char(10) latin1_swedish_ci YES NULL #
time_field time NULL YES NULL #
date_time datetime NULL YES NULL #
new_blob_col varchar(20) latin1_swedish_ci YES NULL #
tinyblob_col tinyblob NULL YES NULL #
mediumblob_col mediumblob NULL NO NULL #
options enum('one','two','tree') latin1_swedish_ci NO NULL #
flags set('one','two','tree') latin1_swedish_ci NO #
new_field char(10) latin1_swedish_ci NO new #
select t1.auto,t2.auto from t1,t2 where t1.auto=t2.auto and ((t1.string<>t2.string and (t1.string is not null or t2.string is not null)) or (t1.tiny<>t2.tiny and (t1.tiny is not null or t2.tiny is not null)) or (t1.short<>t2.short and (t1.short is not null or t2.short is not null)) or (t1.medium<>t2.medium and (t1.medium is not null or t2.medium is not null)) or (t1.long_int<>t2.long_int and (t1.long_int is not null or t2.long_int is not null)) or (t1.longlong<>t2.longlong and (t1.longlong is not null or t2.longlong is not null)) or (t1.real_float<>t2.real_float and (t1.real_float is not null or t2.real_float is not null)) or (t1.real_double<>t2.real_double and (t1.real_double is not null or t2.real_double is not null)) or (t1.utiny<>t2.utiny and (t1.utiny is not null or t2.utiny is not null)) or (t1.ushort<>t2.ushort and (t1.ushort is not null or t2.ushort is not null)) or (t1.umedium<>t2.umedium and (t1.umedium is not null or t2.umedium is not null)) or (t1.ulong<>t2.ulong and (t1.ulong is not null or t2.ulong is not null)) or (t1.ulonglong<>t2.ulonglong and (t1.ulonglong is not null or t2.ulonglong is not null)) or (t1.time_stamp<>t2.time_stamp and (t1.time_stamp is not null or t2.time_stamp is not null)) or (t1.date_field<>t2.date_field and (t1.date_field is not null or t2.date_field is not null)) or (t1.time_field<>t2.time_field and (t1.time_field is not null or t2.time_field is not null)) or (t1.date_time<>t2.date_time and (t1.date_time is not null or t2.date_time is not null)) or (t1.new_blob_col<>t2.new_blob_col and (t1.new_blob_col is not null or t2.new_blob_col is not null)) or (t1.tinyblob_col<>t2.tinyblob_col and (t1.tinyblob_col is not null or t2.tinyblob_col is not null)) or (t1.mediumblob_col<>t2.mediumblob_col and (t1.mediumblob_col is not null or t2.mediumblob_col is not null)) or (t1.options<>t2.options and (t1.options is not null or t2.options is not null)) or (t1.flags<>t2.flags and (t1.flags is not null or t2.flags is not null)) or (t1.new_field<>t2.new_field and (t1.new_field is not null or t2.new_field is not null)));
auto auto
16 16
select t1.auto,t2.auto from t1,t2 where t1.auto=t2.auto and not (t1.string<=>t2.string and t1.tiny<=>t2.tiny and t1.short<=>t2.short and t1.medium<=>t2.medium and t1.long_int<=>t2.long_int and t1.longlong<=>t2.longlong and t1.real_float<=>t2.real_float and t1.real_double<=>t2.real_double and t1.utiny<=>t2.utiny and t1.ushort<=>t2.ushort and t1.umedium<=>t2.umedium and t1.ulong<=>t2.ulong and t1.ulonglong<=>t2.ulonglong and t1.time_stamp<=>t2.time_stamp and t1.date_field<=>t2.date_field and t1.time_field<=>t2.time_field and t1.date_time<=>t2.date_time and t1.new_blob_col<=>t2.new_blob_col and t1.tinyblob_col<=>t2.tinyblob_col and t1.mediumblob_col<=>t2.mediumblob_col and t1.options<=>t2.options and t1.flags<=>t2.flags and t1.new_field<=>t2.new_field);
auto auto
16 16
drop table t2;
create table t2 (primary key (auto)) select auto+1 as auto,1 as t1, 'a' as t2, repeat('a',256) as t3, binary repeat('b',256) as t4, repeat('a',4096) as t5, binary repeat('b',4096) as t6, '' as t7, binary '' as t8 from t1;
show full columns from t2;
Field Type Collation Null Key Default Extra Privileges Comment
auto int(11) unsigned NULL NO PRI 0 #
t1 int(1) NULL NO 0 #
t2 varchar(1) latin1_swedish_ci NO #
t3 varchar(256) latin1_swedish_ci NO #
t4 varbinary(256) NULL NO #
t5 text latin1_swedish_ci NO NULL #
t6 blob NULL NO NULL #
t7 char(0) latin1_swedish_ci NO #
t8 binary(0) NULL NO #
select t1,t2,length(t3),length(t4),length(t5),length(t6),t7,t8 from t2;
t1 t2 length(t3) length(t4) length(t5) length(t6) t7 t8
1 a 256 256 4096 4096
1 a 256 256 4096 4096
1 a 256 256 4096 4096
1 a 256 256 4096 4096
1 a 256 256 4096 4096
1 a 256 256 4096 4096
1 a 256 256 4096 4096
drop table t1,t2;
create table t1 (c int);
insert into t1 values(1),(2);
create table t2 select * from t1;
create table t3 select * from t1, t2;
ERROR 42S21: Duplicate column name 'c'
create table t3 select t1.c AS c1, t2.c AS c2,1 as "const" from t1, t2;
show full columns from t3;
Field Type Collation Null Key Default Extra Privileges Comment
c1 int(11) NULL YES NULL #
c2 int(11) NULL YES NULL #
const int(1) NULL NO 0 #
drop table t1,t2,t3;
create table t1 ( myfield INT NOT NULL, UNIQUE INDEX (myfield), unique (myfield), index(myfield));
Warnings:
Note 1831 Duplicate index 'myfield_2' defined on the table 'test.t1'. This is deprecated and will be disallowed in a future release.
drop table t1;
create table t1 ( id integer unsigned not null primary key );
create table t2 ( id integer unsigned not null primary key );
insert into t1 values (1), (2);
insert into t2 values (1);
select t1.id as id_A, t2.id as id_B from t1 left join t2 using ( id );
id_A id_B
1 1
2 NULL
select t1.id as id_A, t2.id as id_B from t1 left join t2 on (t1.id = t2.id);
id_A id_B
1 1
2 NULL
create table t3 (id_A integer unsigned not null, id_B integer unsigned null );
insert into t3 select t1.id as id_A, t2.id as id_B from t1 left join t2 using ( id );
select * from t3;
id_A id_B
1 1
2 NULL
truncate table t3;
insert into t3 select t1.id as id_A, t2.id as id_B from t1 left join t2 on (t1.id = t2.id);
select * from t3;
id_A id_B
1 1
2 NULL
drop table t3;
create table t3 select t1.id as id_A, t2.id as id_B from t1 left join t2 using ( id );
select * from t3;
id_A id_B
1 1
2 NULL
drop table t3;
create table t3 select t1.id as id_A, t2.id as id_B from t1 left join t2 on (t1.id = t2.id);
select * from t3;
id_A id_B
1 1
2 NULL
drop table t1,t2,t3;
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