what is the use of HASH, LIST partitions?

1 Answers   ITC Infotech,

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What are the Restrictions on Cursor Variables?

2 Answers  

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What is a table partition?

0 Answers  

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How much does sql cost?

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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Can a table contain multiple foreign key’s?

0 Answers  

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What is cascade in sql?

0 Answers  

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What is the importance of sqlcode and sqlerrm?

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Is sqlite thread safe?

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What is secondary key?

0 Answers  

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diff b/w sub query and co-relater query?

3 Answers   iFlex,

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Explain the difference between drop and truncate commands in sql?

0 Answers  

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