Define join and name different types of joins?

0 Answers  

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Is primary key clustered index?

0 Answers  

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how a reference cursor works?what all adnvantages are gained with it..specify the situation?

4 Answers   TCS,

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types of exceptions and what is meant by pragma autonomous_transaction ?what is the use.

4 Answers   3i Infotech,

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What is a sql statement?

0 Answers  

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What is memory optimized table?

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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Which is faster truncate or drop?

0 Answers  

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How to fetch common records from two tables?

1 Answers  

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Which tcp/ip port does sql server run?

0 Answers  

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What is the difference between nvl function, ifnull function, and isnull function?

0 Answers  

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What is normalization? dec 2009

3 Answers   Cognizant,

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