But if you have any column say empid which have the unique constraint then it is better to use the following SQL query
select count(distinct empid ) from employees
I am currently working as a Analyst and have around 7.5 years of experience in database.
Master Degree in Computer(MCA)
Designing of the database.
Writing Complex Stored Procedures,Functions,Triggers etc.
Designing and developing SSIS & DTS packages.
Designing SQL Reports using SSRS.
Database Server Maintenance.
Microsoft certified Sql DBA in Sql server 2008 (MCTS).
Microsoft certified BI professional in Sql server 2008 (MCTS).
Oracle certified profession DBA in ORACLE 10g (OCP)
certified profession DBA in ORACLE 9i (OCP)
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Technical Blog:- Technologies with Vivek Johari
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