how to create a database in oracle?please gve anser with example

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Explain exception handling in pl/sql?

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What is string join?

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How many sql statements are used? Define them.

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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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What is pl/sql language case sensitive?

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What is pivot in sql?

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Define a temp table?

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How is a process of pl/sql compiled?

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Why partition by is used in sql?

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What is consistency?

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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;

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