tell me about select query

A Select Query is used to select specific content from a table. Once you add any content in a table, and if you want to see that content in the table, then a Select Query is used....

Examples -
Select * from TableName  // will give you result of all the content in that table.

Select [column-name] from Table Name // Will show you the content of that specific column              // of that table

You can even select multiple columns at the same time from a table or multiple tables....
The basic use of a Select query is to fetch results from a table or multiple tables...
Hope this is what you wanted to know.

Thank You.
Shivanand Arur.