Length指的是显示宽度,举个例子: mysql> create table test(id int(3) zerofill);Query OK, 0 rows affected (0.09sec) mysql> insert into test(id) values(1),(1234);Query OK, 2 rows affected (0.06sec) Records:2 Duplicates: 0 Warnings: 0mysql> select * from test;+---+ | id | +---...
1. mysql> create table test(id int(3) zerofill); 2. Query OK, 0 rows affected (0.09 sec) 3. 4. mysql> insert into test(id) values(1),(1234); 5. Query OK, 2 rows affected (0.06 sec) 6. Records: 2 Duplicates: 0 Warnings: 0 7. 8. mysql> select * from test; 9. +---...
mysql> insert into t1 values(-1); #取值范围:0--4294967295 ERROR 1264 (22003): Out of range value for column 'id' at row 1 mysql> insert into t1 values(123); mysql> insert into t1 values(12300); mysql> insert into t1 values(1.123); mysql> select * from t1; +---+ | id | +...
mysql> insert into t1 values(-1); #取值范围:0--4294967295 ERROR 1264 (22003): Out of range value for column 'id' at row 1 mysql> insert into t1 values(123); mysql> insert into t1 values(12300); mysql> insert into t1 values(1.123); mysql> select * from t1; +---+ | id | +...
`notification_email_addresses` varchar(512) DEFAULT NULL COMMENT 'Comma separated values of valid emails', `status` enum('WAITING-FOR-COST-CONFIRMATION','COST-CONFIRMED','TRANSMITTED','ACKNOWLEDGED','ABANDONED','SUCCEDED','ARCHIVED','DISPATCH-ERROR','ABORTED-BY-USER') NOT NULL DEFAULT 'WAITING...
数据库版本:MySql 5.7 FIND_IN_SET 定义: 在逗号分隔的字符串列表中查找指定字符串的位置 FIND_IN_SET(str,strlist) FIND_IN_SET()函数接受两个参数: 第一个参数str是要查找的字符串。 第二个参数strlist是要搜索的逗号分隔的字符串列表 FIND_IN_SET()函数根据参数的值返回一个整数或一个NULL值: ...
The LENGTH() function returns the length of a string (in bytes). Syntax LENGTH(string) Parameter Values ParameterDescription stringRequired. The string to count the length for Technical Details Works in:From MySQL 4.0 More Examples Example
NULLcolumns require additional space in the row to record whether their values areNULL. EachNULLcolumn takes one bit extra, rounded up to the nearest byte. Very quick. Easy to cache. Easy to reconstruct after a crash, because rows are located in fixed positions. ...
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I've noticed that MySQL substr() returns value in data type text when the length is over 512. Please check the example below; Data table: create table temp10( c0 int primary key auto_increment, c1 varchar(2500)); insert into temp10(c1) values ('abcd'); ...