what is a sub query?how will you calculate working days in a month using sub query?

4 Answers   InteQ,

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How is data stored on a disk?

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Does varchar need length?

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What is pivot table in sql?

0 Answers  

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Hi All, I am new to both this blog and technology. I was able to see a response for one of the questions on triggers as below. I would like to know why are we using " if rtrim(to_char(sysdate,'day'))=rtrim('sunday') then" instead, can't we use " if sysdate = 'sunday' then". I can understand the use of "rtrim", but dont know y v r using to_char. I have seen this in many cases but did not get a convincible explaination. Please help me with this and do excuse if this question sounds silly. Thanks in advance...... create or replace trigger trg_sun before insert on <table name> begin if rtrim(to_char(sysdate,'day'))=rtrim('sunday') then raise_application_error(-20345,'no transaction in sunday'); end if; end trg_sun;

2 Answers  

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What is pls_integer in pl sql?

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What is the use of non clustered index?

0 Answers  

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Can one improve the performance of sql*loader? : aql loader

0 Answers  

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What is pl sql code?

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What are the set operators in sql?

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What is compilation error in pl sql?

0 Answers  

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What are the Diff B/W Cursor and REF Cursor

3 Answers   CTS,

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