Question

When writing a query for paging on a web page what is the least expensive method to get a total row count? Is there a way to do this without running a query twice – one for the total and the next for the limit?

Using MySQL

Example: (I want to know if there is a less expensive way)

Get Count

SELECT COUNT(*) FROM table

Get Paging

SELECT mycolumns FROM table LIMIT 100

How can I get the total count without running 2 queries.

Answer 1

This will give you an additional column called Count in each row that contains the total number of rows:

SELECT mycolumns, (select count(*) from table) as Count 
FROM table 
LIMIT 100