varbinary.result

来自「视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.」· RESULT 代码 · 共 81 行

drop table if exists t1;
select 0x41,0x41+0,0x41 | 0x7fffffffffffffff | 0,0xffffffffffffffff | 0 ;
0x41	0x41+0	0x41 | 0x7fffffffffffffff | 0	0xffffffffffffffff | 0
A	65	9223372036854775807	18446744073709551615
select 0x31+1,concat(0x31)+1,-0xf;
0x31+1	concat(0x31)+1	-0xf
50	2	-15
select x'31',X'ffff'+0;
x'31'	X'ffff'+0
1	65535
create table t1 (ID int(8) unsigned zerofill not null auto_increment,UNIQ bigint(21) unsigned zerofill not null,primary key (ID),unique (UNIQ) );
insert into t1 set UNIQ=0x38afba1d73e6a18a;
insert into t1 set UNIQ=123;
explain extended select * from t1 where UNIQ=0x38afba1d73e6a18a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	const	UNIQ	UNIQ	8	const	1	
Warnings:
Note	1003	select '00000001' AS `ID`,'004084688022709641610' AS `UNIQ` from `test`.`t1` where 1
drop table t1;
select x'hello';
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'x'hello'' at line 1
select 0xfg;
ERROR 42S22: Unknown column '0xfg' in 'field list'
create table t1 select 1 as x, 2 as xx;
select x,xx from t1;
x	xx
1	2
drop table t1;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` varbinary(255) default NULL,
  `b` varchar(255) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select length(a), length(b) from t1;
length(a)	length(b)
255	3
255	3
CHECK TABLE t1 FOR UPGRADE;
Table	Op	Msg_type	Msg_text
test.t1	check	error	Table upgrade required. Please do "REPAIR TABLE `t1`" to fix it!
REPAIR TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	repair	status	OK
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` varbinary(255) default NULL,
  `b` varchar(255) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select length(a), length(b) from t1;
length(a)	length(b)
3	3
3	3
insert into t1 values("ccc", "ddd");
select length(a), length(b) from t1;
length(a)	length(b)
3	3
3	3
3	3
select hex(a), hex(b) from t1;
hex(a)	hex(b)
616161	636363
626262	646464
636363	646464
select concat("'", a, "'"), concat("'", b, "'") from t1;
concat("'", a, "'")	concat("'", b, "'")
'aaa'	'ccc'
'bbb'	'ddd'
'ccc'	'ddd'
drop table t1;
create table t1(a varbinary(255));
insert into t1 values("aaa   ");
select length(a) from t1;
length(a)
6
alter table t1 modify a varchar(255);
select length(a) from t1;
length(a)
6