Search results for ""

Advanced data filtering using mysql

In this tutorial you will find how to combine WHERE clauses for creating strong searching conditions. You will find also how to use the operators NOT and IN. Combining WHERE Clauses These can be used in two ways: AND clauses, OR clauses. Operators: Specialized reserved words used for clauses unification or modification. AND Operator If you want to ...

Tips for optimizing mysql queries

Use the explain command Use multiple-row INSERT statements to store many rows with one SQL statement. The explain command can tell you which indexes are used with the specified query and many other pieces of useful information that can help you choose a better index or query.Example of usage: explain select * from table explanation of row ...