大约有 1,959 项符合查询结果（耗时：0.0199秒） [XML]
What is Full Text Search vs LIKE
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MySQL creates an index from the words of the enabled full-text search column and performs searches on this index. MySQL uses a sophisticated algorithm to determine the rows matched against the search query.
Also, from this S...
Is there a REAL performance difference between INT and VARCHAR primary keys?
...e performance difference between using INT vs. VARCHAR as a primary key in MySQL? I'd like to use VARCHAR as the primary key for reference lists (think US States, Country Codes) and a coworker won't budge on the INT AUTO_INCREMENT as a primary key for all tables.
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ActiveRecord: List columns in table from console
...console. It will enter the shell of your database, whether it is sqlite or mysql.
Then, you can query the table columns using sql command like:
pragma table_info(your_table);
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How to choose the id generation strategy when using JPA and Hibernate
...table. Do not use in a cluster.
identity
supports identity columns in DB2, MySQL, MS SQL Server, Sybase and HypersonicSQL. The returned identifier is of type long, short or int.
sequence
uses a sequence in DB2, PostgreSQL, Oracle, SAP DB, McKoi or a generator in Interbase. The returned identifier is...
Querying data by joining two tables in two database on different servers
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is it possible with php-mysql ..if yes then can you please suggest me a way how can i grow with that option?
– Jhanvi
Sep 26 '12 at 8:47
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COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
... are using as well as the type of table in some cases.
For example, using MySQL, count(*) will be fast under a MyISAM table but slow under an InnoDB. Under InnoDB you should use count(1) or count(pk).
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Limit results in jQuery UI Autocomplete
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If the results come from a mysql query, it is more efficient to limit directly the mysql result:
select [...] from [...] order by [...] limit 0,10
where 10 is the max numbers of rows you want
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Converting an integer to a string in PHP
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Good point. I threw in some mysql_escape_string functions in there to clean it up.
– Chris Thompson
Jun 23 '09 at 23:33
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Ruby on Rails: how do I sort with two columns using ActiveRecord?
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Assuming you're using MySQL,
Model.all(:order => 'DATE(updated_at), price')
Note the distinction from the other answers. The updated_at column will be a full timestamp, so if you want to sort based on the day it was updated, you need to use ...
How to get english language word database? [closed]
... stuff. Looks like WordNet will be very much useful to you.
Here it is in MySQL format. And this one (web-archived link) uses Wordnet v3.0 data, rather than the older Wordnet 2.0 data.
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