Loading...

mysql 查詢數據資料是否有重複

Temperature: 0 °C

Mark ChangMark Chang
author_tools


mysql 查詢數據資料是否有重複
有沒有試過資料庫裡上萬筆資料卻不知道是不是有重複的數據?

這時你一定要試試這個查詢方法~

//列出是否有重複的姓名
select name,count(*) as count from member_table group by name having count >1
//上列查詢是說要查詢member_table的表單裡有沒有name相同的數量是大於1的

 

https://innstory.com/story-mysql_查詢數據資料是否有重複-1602
Mysql

Prev
 西湖捷運站二樓真的是覓食的好地方

Next
PHP–implode_將陣列轉成字串 

About the Author

Mark Chang

離不開電腦的宅男

Visitor message

Leave some footprints to prove that you visited me

Recommended reading

Author's other related stories

改變input placeholder 字體顏色

改變input placeh...

colorphoto55 通常我們會使用 placeholder 來作為欄位提醒文字~ 通常 pla...

MySQL:ERROR_1067

MySQL:ERROR_10...

最近安裝了Ubuntu Server .系統。 接著安裝了MySQL 5..的版本。 在時間的預設值...

在PHP中通過POST發送JSON

在PHP中通過POST發送J...

這回,我遇到需要通過POST請求發送JSON到API。 剛好利用這次的機會紀錄一下: //API U...

Please select an option

error

Hi, thank you for your participation, but you cannot vote repeatedly~

Join innstory now and start recording your story.

"Innstory" is a place to store stories. We are committed to becoming a warm platform. Deepening the bonds between people is our direction.
We are convinced that the blockchain between people is not just a cold calculation. Join us now.

Wrong format