what is the difference between implicit and explicit trigger

2 Answers   Tech Mahindra,

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Determine if oracle date is on a weekend?

0 Answers  

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how to findout the 100th maximum salary

28 Answers   Amdocs,

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What is sorting in sql?

0 Answers  

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Could you please provide oca (oracle 10g) dumps for my certification ?

1 Answers  

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I have a CURSOR then why we need BULK COLLECT again?

1 Answers  

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Why do we use sql constraints?

0 Answers  

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how many ways to get the current time? : Sql dba

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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 if we write return in procedure?

0 Answers  

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What is sap sql?

0 Answers  

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Why are cursors used?

0 Answers  

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