What does joining a thread mean?

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What are the properties of a transaction?

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How long does it take to learn pl sql?

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What is pivot table in sql?

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Can we alter stored procedure?

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How delete all data from all tables in sql?

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What is the requirement of self-join?

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What are the most important characteristics of pl/sql?

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HOW CAN I FIND MAX SAL ,ENAME FROM EMP TABLE.

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How to disable a trigger name update_salary?

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How many types of relationship are there?

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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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