In the process of using MySQL databases, indexes are an important mechanism that cannot be ignored, significantly enhancing query performance. This article will delve into two fundamental types of ...
I have two tables I'm doing a join with. Table1 has a PK on an id column which is Unique.<BR><BR>Table2 has a PK on two columns, uid,id which is Unique.<BR><BR>If I do a:<BR><BR>SELECT Table1.id, ...
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