Mysql之inner join，left join，right join詳解
Mysql之inner join，left join，right join詳解php 文章分類:PHP編程java 首先借用官方的解釋下：mysql inner join(等值鏈接)：只返回兩個表中聯結字段相等的行；sql left join(左聯接)：返回包括左表中的全部記錄和右表中聯結字段相等的記錄；編程 right join(右聯接)：返回包括右表中的全部記錄和左表中聯結字段相等的記錄。bl
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