- MS Sql Server
- 867
- March-27-2018
- by Rizwan Saqib
Indexes :
If you want your sql queries work and Execute fast we have tips for your First our Topic is Index There is Three Types of Index
1.Clustered Index
2.Non Clustered Index
3.Unique Index
When we create a table in SQL Clustered index auto apply on Primary key ID but we create only one Clustered index in One table
we Create Non clustered index on Required fields in this way non clustered stored all table Fields data in seprate when we search data from table it give us result more than fast because all data manage in seprate
For Example
We have a Employee Table With Below Fields
1,EmployeeName,
2 Age,
3Salary,
4 Department
1.Non Clustered Index
Create NonClustered index EmployeeIndex
On Employee (EmployeeName,Age,Department)
2.Unique Non Clustered Index
Create Unique NonClustered index EmployeeIndex
On Employee (EmployeeName,Age,Department)
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2.Only Select Fields You Need
Second Tip for speed up sql Query to selcet only those field you
need in table Because when we Execute the Queries it spend extra
time to execute on Extra fields
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3.Remove Unnecessary Tables
Third Tip is To Remove Unnecessary tables of Quries for Example
if you have a many table in database who can not use in Queries so
if you delete the extra table its affect on Sql Queries Speed
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4.Remove Unnecessary Joins
When we Create Store Procedures and we joins the table to others table if we use Unnecessary joins in Procedure its affect on the speed of Execution but when we use limited joins then speed of queries is up
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5.Remove Calculated Fields in JOIN and WHERE Clauses
Fifth tip for Speed up Queries Remove Calculated fields in joins and where clauses Because its affect on Queries speed If we use a limited calculated fields speed of our queries is up
