大约有 19,000 项符合查询结果（耗时：0.0260秒） [XML]
How do I show a MySQL warning that just happened?
I just ran a simple MySQL CREATE TABLE statement that produced the line
3 Answers
3
...
select * vs select column
...the top of my head is when you want only the value of an indexed column in MySQL (for example, just to check for row existence), and you're using MyISAM storage engine, it'll grab the data from the MYI file, which could be in memory, and not even go to disk!
– Mike Sherov
...
Invalid default value for 'create_date' timestamp field
...t ignore this option. This is server option. If you have access to my.ini (mysql configuration file), then remove NO_ZERO_DATE from sql-mode option and restart server.
– Devart
Feb 8 '12 at 11:44
...
MySQL “Group By” and “Order By”
... non-aggregate columns in a SELECT with a GROUP BY clause is non-standard. MySQL will generally return the values of the first row it finds and discard the rest. Any ORDER BY clauses will only apply to the returned column value, not to the discarded ones.
IMPORTANT UPDATE
Selecting non-aggregate col...
MySQL ON DUPLICATE KEY - last insert id?
...heck this page out: https://web.archive.org/web/20150329004325/https://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html
At the bottom of the page they explain how you can make LAST_INSERT_ID meaningful for updates by passing an expression to that MySQL function.
From the MySQL documentation...
No module named MySQLdb
I am using Python version 2.5.4 and install MySQL version 5.0 and Django. Django is working fine with Python, but not MySQL. I am using it in Windows Vista.
...
MySQL error code: 1175 during UPDATE in MySQL Workbench
I'm trying to update the column visited to give it the value 1. I use MySQL workbench, and I'm writing the statement in the SQL editor from inside the workbench. I'm writing the following command:
...
Linux 进程卡住了怎么办？ - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...ffffffff>] 0xffffffffffffffff
这时候按 Ctrl+C 也不能退出。
root@localhost:~# ls /jfs
^C
^C^C^C^C^C
但是用 strace 却能唤醒它，并且开始处理之前的中断信号，然后就退出了。
root@localhost:~# strace -p `pgrep ls`
strace: Process 26469 attached
--- SI...
MySQL 'create schema' and 'create database' - Is there any difference
... between the create schema command and the create database command for MySQL.
6 Answers
...
MySQL: Insert record if not exists in table
...
if you need to get warning message you can afterwards do mysql> show warnings\G
– fiorentinoing
Oct 20 '16 at 18:59
2
...