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- www.w3schools.com
  
  SQL UPDATE Statement - W3Schools
  
  Well organized easy to understand SQL tutorial with lots of examples. Including PHP ... Notice the WHERE clause in the SQL UPDATE statement! The WHERE ...
  
  2025-11-18
  
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- www.1keydata.com
  
  SQL ALTER TABLE - 1Keydata SQL 語法教學
  
  這一頁介紹SQL 中的ALTER TABLE 指令。 ... SQL UPDATE · SQL DELETE FROM · 網站導引 · 其他資源其他語言: ... ALTER TABLE 的語法如下：. ALTER TABLE ...
  
  2025-11-17
  
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SQL - MODIFY COLUMN | 1Keydata - 1Keydata - Free Online Programming Tutorials

日期：2025-11-16

The 1Keydata SQL Tutorial teaches beginners the building blocks of SQL. This section explains how to modify a column on a table. ... SQL > SQL ALTER TABLE > Modify Column Syntax Sometimes we need to change the data type of a column. To do this, we ......

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SQL ALTER TABLE Statement - W3Schools

日期：2025-11-19

Well organized easy to understand SQL tutorial with lots of examples. ... The ALTER TABLE statement is used to add, delete, or modify columns in an existing ......

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SQL - MODIFY COLUMN | 1Keydata

日期：2025-11-14

The 1Keydata SQL Tutorial teaches beginners the building blocks of SQL. This section explains how to modify a column on a table....

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SQL: ALTER TABLE Statement - TechOnTheNet.com

日期：2025-11-15

Learn how to use the SQL ALTER TABLE statement to add a column, modify a column, drop a column, rename a column or rename a table (with lots of clear, ......

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SQL ALTER TABLE - 1Keydata SQL 語法教學

日期：2025-11-13

改變欄位的資料種類: MODIFY "欄位 1" "新資料種類" 以下我們用在CREATE TABLE 一頁建出的 Customer 表格來當作例子： Customer 表格欄位名稱資料種類 First_Name char(50) Last_Name char(50) Address char(50 ......

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SQL: ALTER TABLE Statement - TechOnTheNet.com

日期：2025-11-17

Learn how to use the SQL ALTER TABLE statement to add a column, modify a column, drop a column, rename a column or rename a table (with lots of clear, concise examples). We've also added some practice exercises that you can try for yourself. The SQL ......

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