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, ...

Do you have a large data import that leaves your indexes less than perfect? Do you want to backup your current database before you run a purge package? You are in luck; SSIS contains a handful of ...