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                # SQL UCASE() 函數 ## UCASE() 函數 UCASE 函數把字段的值轉換為大寫。 ### SQL UCASE() 語法 ``` SELECT UCASE(column_name) FROM table_name ``` ## SQL UCASE() 實例 我們擁有下面這個 "Persons" 表: | Id | LastName | FirstName | Address | City | | --- | --- | --- | --- | --- | | 1 | Adams | John | Oxford Street | London | | 2 | Bush | George | Fifth Avenue | New York | | 3 | Carter | Thomas | Changan Street | Beijing | 現在,我們希望選取 "LastName" 和 "FirstName" 列的內容,然后把 "LastName" 列轉換為大寫。 我們使用如下 SQL 語句: ``` SELECT UCASE(LastName) as LastName,FirstName FROM Persons ``` 結果集類似這樣: | LastName | FirstName | | --- | --- | | ADAMS | John | | BUSH | George | | CARTER | Thomas |
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