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What are the differences between the BLOB and TEXT datatypes in MySQL?
...rted and compared based on the collation of the character set.
http://dev.mysql.com/doc/refman/5.0/en/blob.html
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SQL query return data from multiple tables
...mply a color listing so that we know what colors we have in the car yard.
mysql> create table colors(id int(3) not null auto_increment primary key,
-> color varchar(15), paint varchar(10));
Query OK, 0 rows affected (0.01 sec)
mysql> show columns from colors;
+-------+-------------+-...
MySQL - Using COUNT(*) in the WHERE clause
I am trying to accomplish the following in MySQL (see pseudo code)
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With MySQL, how can I generate a column containing the record index in a table?
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@smhnaji MySQL requires that every "derived table" is given a name. I decided to call it "r" :) ... It has little purpose in this case, but you'd normally use it to reference attributes of the derived table, as if it was a real table....
Update one MySQL table with values from another
I'm trying to update one MySQL table based on information from another.
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MySQL get row position in ORDER BY
With the following MySQL table:
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Delete all records in a table of MYSQL in phpMyAdmin
... detailed blog with example: http://sforsuresh.in/phpmyadmin-deleting-rows-mysql-table/
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Find rows that have the same value on a column in MySQL
... created what was essentially infinite recursion or something on mysql resulting in a dead database due to "too many connections" :-/
– huygir
Mar 5 '18 at 17:40
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How to prepend a string to a column value in MySQL?
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Many string update functions in MySQL seems to be working like this:
If one argument is null, then concatenation or other functions return null too.
So, to update a field with null value, first set it to a non-null value, such as ''
For example:
update ta...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术
...的一个。 本文的目的是解释ØMQ架构的基本概念，它们是如何组合起来的，以及它们被如此设计的原因。 拓扑 拓扑是ØMQ最主要的概念，除非你知道“拓扑”代表什么，否则将与其他概念混淆更难理解，甚至理解不当。 按...