大约有 7,000 项符合查询结果（耗时：0.0204秒） [XML]
Auto increment in phpmyadmin
I have an existing database using PHP, MySQL and phpMyAdmin.
9 Answers
9
...
Favourite performance tuning tricks [closed]
...
Assuming MySQL here, use EXPLAIN to find out what is going on with the query, make sure that the indexes are being used as efficiently as possible and try to eliminate file sorts. High Performance MySQL: Optimization, Backups, Replica...
How to change the name of a Django app?
...E <oldAppName>_modelName RENAME TO <newAppName>_modelName. For mysql too I think it is the same (as mentioned by @null_radix)
(For Django >= 1.7) Update the django_migrations table to avoid having your previous migrations re-run: UPDATE django_migrations SET app='<NewAppName>' W...
How to get last inserted row ID from WordPress database?
...
Putting the call to mysql_insert_id() inside a transaction, should do it:
mysql_query('BEGIN');
// Whatever code that does the insert here.
$id = mysql_insert_id();
mysql_query('COMMIT');
// Stuff with $id.
...
Check if table exists without using “select from”
...elf stated to do it is the proper way. There is no 'exists' type statement MySql. 'Exists' in MySql is a clause which requires an operation such as SELECT, UPDATE, or DELETE.
– doogle
Jan 12 '12 at 1:51
...
Error 908: Permission RECEIVE_SMS has been denied. - App Inventor 2 中...
...的讨论。一位用户遇到了这个问题，并询问是否有人知道如何解决。其他用户提供了一些可能的解决方案，包括检查应用程序权限设置、确保手机上的权限设置正确、重新编译应用程序等。有人建议检查应用程序是否有读取短信...
Referring to a Column Alias in a WHERE Clause
... I think using HAVING on aliases is not standard (it does works on MySQL, though). Specifically, I think it does not work with SQL Server.
– tokland
Nov 25 '16 at 12:10
...
Explicit vs implicit SQL joins
...
On MySQL 5.1.51, both queries have identical execution plans:
mysql> explain select * from table1 a inner join table2 b on a.pid = b.pid;
+----+-------------+-------+------+---------------+------+---------+--------------+---...
Convert a date format in PHP
...
What if I get this date 0000-00-00 from mySQL? it returns a wrong date like 31/12/1969 ...
– Enrique
Apr 29 '10 at 22:20
3
...
ALTER TABLE to add a composite primary key
...r table you will get an error when trying to drop it. In some versions of mysql the error message there was malformed (as of 5.5.17, this error message is still
alter table parent drop column id;
ERROR 1025 (HY000): Error on rename of
'./test/#sql-a04_b' to './test/parent' (errno: 150).
If you ...