ALTER TABLE [dbo].[TABLE] ADD CONSTRAINT
UNIQUE_Table UNIQUE CLUSTERED
(
col1,
col2
)
UNIQUE_Table UNIQUE CLUSTERED
(
col1,
col2
)
- 7月 24 週四 201416:55
在SQL中，當二個鍵同時相等時，唯一鍵成立。
- 3月 10 週一 201413:00
關於mysqlnd cannot connect to MySQL 4.1+
一直遇到php連不上MySQL的問題
mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please use an administration tool to reset your password with the command SET PASSWORD = PASSWORD('your_existing_password'). This will store a new, and more secure, hash value in mysql.user. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file
後來才發現原來是MySQL換密碼加密的方式，所以只要SET PASSWORD = PASSWORD('your_existing_password')
後來又發現要將SET SESSION old_passwords = 0;才行
詳細內容
mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please use an administration tool to reset your password with the command SET PASSWORD = PASSWORD('your_existing_password'). This will store a new, and more secure, hash value in mysql.user. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file
後來才發現原來是MySQL換密碼加密的方式，所以只要SET PASSWORD = PASSWORD('your_existing_password')
後來又發現要將SET SESSION old_passwords = 0;才行
詳細內容
- 3月 08 週六 201410:33
更改MySql的DATETIME column
UPDATE `tablename` SET `time`=DATE_SUB(`time`, INTERVAL 3 HOUR) WHERE 1
1
