Author: S K S

Generally, tables or result sets sometimes contain duplicate records. Most of the times it is allowed but sometimes it is required to stop duplicate records. It is required to identify…

A sequence is a set of integers 1, 2, 3, ... that are generated in order on a specific demand. Sequences are frequently used in the databases because many applications…

Obtaining and Using MySQL Metadata There are three types of information, which you would like to have from MySQL. Information about the result of queries − This includes the number of…

There may be a situation when you need an exact copy of a table and CREATE TABLE ... SELECT doesn't suit your purposes because the copy must include the same indexes, default…

The temporary tables could be very useful in some cases to keep temporary data. The most important thing that should be known for temporary tables is that they will be…

A database index is a data structure that improves the speed of operations in a table. Indexes can be created using one or more columns, providing the basis for both…

The MySQL ALTER command is very useful when you want to change a name of your table, any table field or if you want to add or delete an existing column in…

A transaction is a sequential group of database manipulation operations, which is performed as if it were one single work unit. In other words, a transaction will never be complete…

You have seen MySQL pattern matching with LIKE ...%. MySQL supports another type of pattern matching operation based on the regular expressions and the REGEXP operator. If you are aware of PHP or…

We have seen the SQL SELECT command along with the WHERE clause to fetch data from a MySQL table, but when we try to give a condition, which compares the field or the column…