大约有 40,000 项符合查询结果（耗时：0.0137秒） [XML]
Is having an 'OR' in an INNER JOIN condition a bad idea?
... a MERGE JOIN.
It can be expressed as a concatenation of two resultsets:
SELECT *
FROM maintable m
JOIN othertable o
ON o.parentId = m.id
UNION
SELECT *
FROM maintable m
JOIN othertable o
ON o.id = m.parentId
, each of them being an equijoin, however, SQL Server's optimiz...
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock'
I installed MySQL on Mac OS X Mountain Lion with homebrew install mysql , but when I tried mysql -u root I got the following error:
...
How do I import an SQL file using the command line in MySQL?
...
Try:
mysql -u username -p database_name < file.sql
Check MySQL Options.
Note-1: It is better to use the full path of the SQL file file.sql.
Note-2: Use -R and --triggers to keep the routines and triggers of original databas...
Mysql adding user for remote access
... that you have to create or update a user. look for all your mysql users:
SELECT user,password,host FROM user;
as soon as you got your user set up you should be able to connect like this:
mysql -h localhost -u gmeier -p
hope it helps
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How do I remove a MySQL database?
...e from my last question that a problem caused some more problems, Reading MySQL manuals in MySQL monitor?
6 Answers
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How to grant remote access to MySQL for a whole subnet?
...imply use a percent sign as a wildcard in the IP address.
From http://dev.mysql.com/doc/refman/5.1/en/grant.html
You can specify wildcards in the host name. For example, user_name@'%.example.com' applies to user_name for any host in the example.com domain, and user_name@'192.168.1.%' applies to...
Facebook database design?
...O_INCREMENT=2 DEFAULT CHARSET=utf8;
Friends of Friends Query:
(
select friend_id
from friends
where user_id = 1
) union (
select distinct ff.friend_id
from
friends f
join friends ff on ff.user_id = f.friend_id
where f.use...
How to stop mysqld
To find out the start command for mysqld (using a mac) I can do:
17 Answers
17
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How to remove MySQL root password [closed]
...set the password for root@localhost to be blank. There are two ways:
The MySQL SET PASSWORD command:
SET PASSWORD FOR root@localhost=PASSWORD('');
Using the command-line mysqladmin tool:
mysqladmin -u root -pType_in_your_current_password_here password ''
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PostgreSQL: Show tables in PostgreSQL
...a:
\dt
Programmatically (or from the psql interface too, of course):
SELECT * FROM pg_catalog.pg_tables;
The system tables live in the pg_catalog database.
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