大约有 7,000 项符合查询结果(耗时:0.0158秒) [XML]

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FIND_IN_SET() vs IN()

...ould even use an index on companyID. Unfortunately, this does not work in MySQL since the latter does not support arrays. You may find this article interesting (see #2): 10 things in MySQL (that won’t work as expected) Update: If there is some reasonable limit on the number of values in the...
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Select last N rows from MySQL

I want to select last 50 rows from MySQL database within column named id which is primary key . Goal is that the rows should be sorted by id in ASC order, that’s why this query isn’t working ...
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How to delete a certain row from mysql table with same column values?

I have a problem with my queries in MySQL. My table has 4 columns and it looks something like this: 6 Answers ...
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PDO mysql: How to know if insert was successful

I'm using PDO to insert a record (mysql and php) 7 Answers 7 ...
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Update date + one year in mysql

When I want setting numerical value +1 in mysql table, I use e.g.: 3 Answers 3 ...
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MySQL - Rows to Columns

...ts, but I only found solutions for SQL Server/Access. I need a solution in MySQL (5.X). 12 Answers ...
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一个故事告诉你比特币的原理及运作机制 - 创意 - 清泛网 - 专注C/C++及内核技术

...这样以物易物实在太不方便了,于是村子全员开会,讨论如何解决这个问题。有人提议,以便于分割且稀有的东西,例如黄金,作为一般等价物,把其它物品和黄金的对应关系编成一张表格,例如一克黄金对应一只羊,一克黄金...
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Detect if value is number in MySQL

Is there a way to detect if a value is a number in a MySQL query? Such as 15 Answers 1...
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How to remove leading and trailing whitespace in a MySQL field?

...really curious as to why this answer's got so many upvotes. Are you using mysql? What version? – billynoah May 16 '16 at 4:30 ...
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What resources exist for Database performance-tuning? [closed]

...er to a not-the-same-inquiry is probably a good start. Hidden Features of MySQL share | improve this answer | follow | ...