What is the use of time stamp in select statement?

1 Answers   TCS,

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How will you delete a particular row from a Table?

7 Answers   Cap Gemini,

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Explain the working of primary key?

0 Answers  

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How do I run 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 a table in a database ? : Sql dba

0 Answers  

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Is it possible to Restore a Dropped Table using Rollback Command in Oracle SQL Plus ?

0 Answers   MCN Solutions,

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What are the sql versions?

0 Answers  

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what are all different types of collation sensitivity? : Sql dba

0 Answers  

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What are the rules to be applied to nulls whilst doing comparisons?

0 Answers  

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What is auto increment?

0 Answers  

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What are the uses of merge?

0 Answers  

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