To display 15 records starting with the 5th record, the last line of the previous statement would be LIMIT 4, What's going on here? This is a demonstration of a subquery. Any results from the subquery will essentially be treated as a temporary table, existing for the duration of the statement's execution only. The highest grade gets a rank of 1, the next highest grade gets a rank of 2, and so on. In other words, if we were to run just the subquery by itself, the results might look something like:.
Thus, the exterior query returns only 5 records, which correspond to the records that have a rankByGrade of 5 or less, or, in our case, the top 5 students. Thanks to Mike Halla, database guru, for providing a sample Oracle query to address this issue. I am really inspired along with your writing skills neatly as with the layout in your weblog. Is this a paid subject matter or did you modify it your self? Your email address will not be published. Collectives on Stack Overflow.
Learn more. How to retrieve half of records from a table - Oracle 11g Ask Question. Asked 6 years, 7 months ago. Active 3 years, 1 month ago. Viewed 20k times. What's the best way do you think i can do this?
Improve this question. Fulvio Fulvio 2 2 gold badges 13 13 silver badges 21 21 bronze badges. What version of Oracle are you using?
And, how precise does "half" need to be? Oracle 11g, and could be random — Fulvio. Add a comment. Active Oldest Votes. If you want to use the output of the query, use something like: select Improve this answer. David Aldridge David Aldridge Upvoted for the sample syntax, which would be the right solution if "about half" is sufficient for the OP.
Giorgi Nakeuri Giorgi Nakeuri LalitKumarB, ok thx. In oracle it is working. Harish Raju Harish Raju 11 1 1 bronze badge. Charles Bretana Charles Bretana k 22 22 gold badges silver badges bronze badges.
The first query is definitely having a syntax error. I guess it is sql server syntax. In Oracle it will certainly fail.
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