Re: distinct clause issue for 600000 records
Posted by:
Ra Nala
Date: November 16, 2015 04:12AM
Øystein Grøvlen Wrote:
-------------------------------------------------------
> Hi,
>
> I am not sure what "distinct clause issue"
Okay, my question is .... is it good practice to write the DISTINCT in extraction (select query) or not ?. as per my DBA input it is bad practice , his suggestion was, instead of DISTINCT better to write sub select query to avoid duplicates.
>
> I do not understand what you mean by "Cardinality
> length"
generally when we create foreign key relation ship between master and child tables then be default Cardinality will be created based on 1:1 or 1:n in this way.
as per my DBA input, in my database, large size was created for Cardinality length, and his suggestion is,better to reduce the Cardinality length so that performance will be improved.
I hope you are able to understand the my inputs.
Subject
Views
Written By
Posted
2027
November 10, 2015 08:57AM
1124
November 11, 2015 12:33PM
1006
November 12, 2015 12:49AM
1122
November 12, 2015 03:20AM
1023
November 12, 2015 07:24PM
1229
November 12, 2015 07:08AM
1197
November 12, 2015 07:18AM
1239
November 12, 2015 07:43AM
1138
November 13, 2015 12:37AM
1234
November 13, 2015 12:45AM
1267
November 13, 2015 02:42AM
1278
November 13, 2015 05:56AM
1107
November 13, 2015 06:38AM
1190
November 13, 2015 07:15AM
1158
November 13, 2015 08:11AM
1121
November 13, 2015 11:35AM
1187
November 16, 2015 03:04AM
Re: distinct clause issue for 600000 records
1116
November 16, 2015 04:12AM
1061
November 16, 2015 05:54AM