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LIMIT 10..20 in SQL Server

... not part of standard SQL. It's supported as a vendor extension to SQL by MySQL, PostgreSQL, and SQLite. Other brands of database may have similar features (e.g. TOP in Microsoft SQL Server), but these don't always work identically. It's hard to use TOP in Microsoft SQL Server to mimic the LIMI...
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count(*) vs count(column-name) - which is more correct? [duplicate]

... there is a performance difference (at least in MySQL) as well (see my answer). – nickf Jun 9 '10 at 7:51 1 ...
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常用Sql - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

常用Sqlmysql:drop table if exists tablename;不能写成drop table tablename if exists tablename;mysql:建立索引SqlCREATE TABLE t...mysql:drop table if exists tablename; 不能写成 drop table tablename if exists tablename; mysql:建立索引Sql CREATE TABLE tablename ( `ID...
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PHP的函数前加上“@”的作用 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...供的错误信息屏蔽的专用符号。比如在一个函数前使用@@mysql_query 不会出现Warning,而原来mysql_query 在遇到错误时会在页面上访提示Warning。@是PHP提供的错误信息屏蔽的专用符号。 比如在一个函数前使用@ @mysql_query 不会出现Warning...
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Curses library not found. Please install appropriate package - 更多...

Curses library not found. Please install appropriate packageCentOS安装MySql报错:-- Could NOT find Curses (missing: CURSES_LIBRARY CURSES_INCLUDE_PATH)CMake Error at cmake readli...CentOS安装MySql报错: -- Could NOT find Curses (missing: CURSES_LIBRARY CURSES_INCLUDE_PATH) CMake Err...
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UTF-8: General? Bin? Unicode?

...only one-to-one comparisons between characters. Quoted from: http://dev.mysql.com/doc/refman/5.0/en/charset-unicode-sets.html For more detailed explanation, please read the following post from MySQL forums: http://forums.mysql.com/read.php?103,187048,188748 As for utf8_bin: Both utf8_general_ci...
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Count the number of occurrences of a string in a VARCHAR field?

...test 0 test4 valuevaluevaluevaluevalue 5 I don't have MySQL install, but goggled to find the Equivalent of LEN is LENGTH while REPLACE is same. So the equivalent query in MySql should be SELECT TITLE,DESCRIPTION, (LENGTH(DESCRIPTION) - LENGTH(REPLACE(DESCRIPTION, 'value', ''))...
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In MySQL queries, why use join instead of where?

... Performance Perspective: Where supported (Oracle 9i+, PostgreSQL 7.2+, MySQL 3.23+, SQL Server 2000+), there is no performance benefit to using either syntax over the other. The optimizer sees them as the same query. But more complex queries can benefit from using ANSI-92 syntax: Ability to ...
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MySQL Multiple Joins in one query?

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Export to CSV via PHP

...p, $fields); } fclose($fp); ?> First you must load the data from the mysql server in to a array share | improve this answer | follow | ...