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- dev.mysql.com
  
  MySQL :: MySQL 5.1 Reference Manual :: 13.2.8 SELECT Syntax
  
  SELECT can also be used to retrieve rows computed without reference to any table. For example: mysql> SELECT 1 + 1;-> 2 You are permitted to specify DUAL as a dummy table name in situations where no tables are referenced: mysql> SELECT ...
  
  2026-04-22
  
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- dev.mysql.com
  
  MySQL :: MySQL 5.5 Reference Manual :: 13.2.11 UPDATE Syntax
  
  Update column in a table whose values are not found in another table. UPDATE TABLE_1 LEFT JOIN TABLE_2 ON TABLE_1.COLUMN_1= TABLE_2.COLUMN_2 SET TABLE_1.COLUMN = EXPR WHERE TABLE_2.COLUMN2 IS NULL An outerjoin is performed ...
  
  2026-04-18
  
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MySQL SELECT同時UPDATE同一張表 - afeiqiang的專欄 - 博客頻道 - CSDN.NET

日期：2026-04-24

MySQL不允許SELECT FROM後面指向用作UPDATE的表，有時候讓人糾結。當然，有比創建無休止的臨時表更好的辦法。本文解釋如何UPDATE一張表，同時在查詢子句中使用SELECT.問題描述假設我要UPDATE的表跟查詢子句是同一張表，這樣做有許多種原因 ......

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MySQL Subqueries Tutorial | eHow - eHow | How to - Discover the expert in you!

日期：2026-04-19

The Syntax The basic syntax for a subquery is this: SELECT * FROM table WHERE columna = (SELECT columnb FROM table2) GO Subqueries must be a SELECT, INSERT, UPDATE, DELETE, SET or DO statement, and you cannot modify a table and select ......

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sql - MYSQL Update Statement Inner Join Tables - Stack Overflow

日期：2026-04-17

I have no idea what the problem is. Using MySQL 5.0 i get a compile error when attempting to run the following MYSQL update statement UPDATE b SET b.mapx = g.latitude, b ......

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MySQL Tutorial - Select - Tizag Tutorials

日期：2026-04-24

Learn how to execute a MySQL select statement using PHP with Tizag.com's MySQL Select lesson. ... MySQL Select You have seen two types of MySQL queries thus far: the query which we used to create a table and the query we used to insert data into our ......

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