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, ...

The indexes on a the tables of a large database make a huge difference in its performance and utility. Without an index, locating a single record in a large table can take several seconds; with the ...

The open source MySQL spin-off has steadily added features all its own. Here are five good reasons to switch to MariaDB.

Designing an appropriate set of indexes can be one of the more troubling aspects of developing efficient relational database applications. Perhaps, the most important thing you can do to assure ...

In an earlier tip I discussed how indexes can speed up processing. It's only fair that I also talk about when indexes don't help. First: Because indexes don't always help but do always increase the ...

I have a table that links two other tables together. I've defined an index on the first column, and its cardinality ends up being 218 (out of 5000+ rows). If I then ...