Please start any new threads on our new
site at https://forums.sqlteam.com. We've got lots of great SQL Server
experts to answer whatever question you can come up with.
| Author |
Topic |
|
suriyarupa
Starting Member
19 Posts |
 Posted - 2013-05-06 : 02:43:55
|
| Creating index with varchar datatype is better? or with nvarchar is better? I know with integers it will give good performance. But i want to create index with string columns. |
|
|
visakh16
Very Important crosS Applying yaK Herder
52326 Posts |
Posted - 2013-05-06 : 02:59:37
|
| nvarchar will assume more space for storage and index table will also increase (assuming non clustered). But if there's a compelling reason for field to be nvarchar then keep it as is (just like storing different language characters etc)Choice of column(s) for index will also depend on lot of other factors like selectivity of data, usage in queries tec------------------------------------------------------------------------------------------------------SQL Server MVPhttp://visakhm.blogspot.com/https://www.facebook.com/VmBlogs |
 |
|
|
suriyarupa
Starting Member
19 Posts |
Posted - 2013-05-06 : 03:16:42
|
| Thanks visakh. |
|
|
|
visakh16
Very Important crosS Applying yaK Herder
52326 Posts |
Posted - 2013-05-06 : 04:31:36
|
| welcome------------------------------------------------------------------------------------------------------SQL Server MVPhttp://visakhm.blogspot.com/https://www.facebook.com/VmBlogs |
|
|
|
suriyarupa
Starting Member
19 Posts |
Posted - 2013-05-06 : 07:35:44
|
| Hi vishak,I want to create index with 6 columns, all are having nvarchar(50) datatype. Can I create? It will reduce execution time? |
|
|
|
visakh16
Very Important crosS Applying yaK Herder
52326 Posts |
Posted - 2013-05-06 : 07:41:44
|
quote:
Originally posted by suriyarupa
Hi vishak,I want to create index with 6 columns, all are having nvarchar(50) datatype. Can I create? It will reduce execution time?
Not something anybody can easily advise you on without knowing your table size, columns involved, their usage in queries, data selectivity, uniqueness etc in each of those columns------------------------------------------------------------------------------------------------------SQL Server MVPhttp://visakhm.blogspot.com/https://www.facebook.com/VmBlogs |
|
|
|
|
|
|
Index