Case statement in order by clause in oracle

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  http://orafaq.com/node/55
The article is intended for SQL coders, who for might be not be using analytic functions due to unfamiliarity with its cryptic syntax or uncertainty about its logic of operation. What about when you have a data set that contains records with timestamps and you would like to roll them up to the second and then look at a sliding window to find, say the busiest 5 minutes of the day? It is trivial to create the query to aggregate the data into per-second blocks but I cannot figure out the syntax to put a window around it

ORDER BY clause

  http://docs.oracle.com/javadb/10.6.2.1/ref/rrefsqlj13658.html
If the null ordering is not specified then the handling of the null values is: NULLS LAST if the sort is ASC NULLS FIRST if the sort is DESC If neither ascending nor descending order is specified, and the null ordering is also not specified, then both defaults are used and thus the order will be ascending with NULLS LAST

case expressions and statements in oracle 9i

  http://www.oracle-developer.net/display.php?id=206
This is especially useful in two ways: when we need to order data with no inherent order properties; and when we need to support user-defined ordering from a front-end application. With this, we do not need to resort to dynamic SQL solutions which are more difficult to maintain and debug but can also be slower to fetch due to additional soft parsing

CASE Statement

  http://docs.oracle.com/cd/B12037_01/appdev.101/b10807/13_elems004.htm
You can include CASE expressions inside SQL queries, for example instead of a call to the DECODE function or some other function that translates from one value to another. The CASE statement evaluates a single expression and compares it against several potential values, or evaluates multiple Boolean expressions and chooses the first one that is TRUE

sql - Conditional WHERE clause with CASE statement in Oracle - Stack Overflow

  http://stackoverflow.com/questions/18104884/conditional-where-clause-with-case-statement-in-oracle
(that part was not by doing and I'm stuck with implementing things this way) If they choose the No Selection option, then I just want to return all states by default, otherwise return just the list of states that are in my comma-separated list

Oracle CASE tips

  http://www.dba-oracle.com/t_case_sql_clause.htm
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  http://www.techonthenet.com/oracle/order_by.php
Note: If the ASC or DESC modifier is not provided in the ORDER BY clause, the results will be sorted by expression in ascending order (which is equivalent to ORDER BY expression ASC. Example - Sorting by relative position You can also use the Oracle ORDER BY clause to sort by relative position in the result set, where the first field in the result set is 1

  http://www.compoundtheory.com/case-in-order-by-statement/
As for ASC and DESC, I have implemented dynamic sorting like this: SELECT t1.* FROM (SELECT ID, Name FROM tblTest ORDER BY DECODE(1, 1, Name, 2, ID, Name)) t1 ORDER BY ROWNUM * 1 In the outermost ORDER BY, note the statement ROWNUM * 1. But I must say that you could have avoided all this by simply having the release data be the same as the create date in the case where the user wants it released now

  http://blog.sqlauthority.com/2007/07/17/sql-server-case-statement-in-order-by-clause-order-by-using-variable/
And it take around 3-4 second to load records But if i put fixed order by with direction then it will not 1 second so can you please help me to optimize my query. Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account