Tuning SQL for Optimal Performance - Sybase

Manual Approach – SQL Tuning• Time the alternatives in ISQLiSQLSET STATISTICS IO ONGOSET STATISTICS TIME ONGOSELECT *FROM EMPLOYEEWHERE EMP_ID > 73712GOSET STATISTICS IO OFFGOSET STATISTICS TIME OFFGOServer Message: Number 3631, Severity 10Line 1:Total actual I/O cost for this command: 0.Total writes for this command: 0Server Message: Number 3631, Severity 10Line 1:Total actual I/O cost for this command: 0.Total writes for this command: 0Execution Time 0.SQL Server cpu time: 0 ms. SQL Server elapsed time: 3614 ms.Parse and Compile Time 0.SQL Server cpu time: 0 ms.Table: EMPLOYEE scan count 1, logical reads: (regular=1030 apf=0 total=1030),physical reads: (regular=0 apf=0 total=0), apf IOs used=0Server Message: Number 3631, Severity 10Line 1:Total actual I/O cost for this command: 2060.Total writes for this command: 0Execution Time 16.SQL Server cpu time: 1600 ms. SQL Server elapsed time: 7730 ms.(18371 rows affected)Parse and Compile Time 0.SQL Server cpu time: 0 ms.Execution Time 0.SQL Server cpu time: 0 ms. SQL Server elapsed time: 0 ms.Parse and Compile Time 0.SQL Server cpu time: 0 ms.