Oracle Not Equals Operator

Question

There are two not equals operator -    and  lt  gt     What s the difference between them  I heard that    is more efficient than other for comparing strings  Could anyone give a qualitative comment on this statement

User · Answer

There is no functional or performance difference between the two. Use whichever syntax appeals to you.

It's just like the use of AS and IS when declaring a function or procedure. They are completely interchangeable.

User · Answer

As everybody else has said  there is no difference    As a sanity check I did some tests  but it was a waste of time  of course they work the same    But there are actually FOUR types of inequality operators           lt    and       See this page in the Oracle SQL reference   On the website the fourth operator shows up as     but in the PDF it shows as       According to the documentation some of them are unavailable on some platforms   Which really means that     almost never works   Just out of curiosity  I d really like to know what environment     works on

User · Answer

They are the same  as is the third form        Note  though  that they are still considered different from the point of view of the parser  that is a stored outline defined for a    won t match  lt  gt  or      This is unlike PostgreSQL where the parser treats    and  lt  gt  yet on parsing stage  so you cannot overload    and  lt  gt  to be different operators

User · Answer

They are the same  but i ve heard people say that Developers use    while BA s use  lt  gt

User · Answer

Developers using a mybatis-like framework will prefer    over  lt    Reason being the  lt   will need to be wrapped in CDATA as it could be interpreted as xml syntax  Easier on the eyes too

User · Answer

The difference is     If you use     it returns sub-second  If you use  lt  gt   it takes 7 seconds to return  Both return the right answer    Oracle not equals      SQL operator  Regards

[sql] Oracle Not Equals Operator

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