Describe different types of general function used in sql?

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What is constant in pl sql?

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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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i hv 30 rows with date.ex:1month hav 4 weeks i want 1st day of the every week.write the qry for that.example jan has 4 weeks i need 1st dd for evry wk

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explain mysql aggregate functions. : Sql dba

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how to see the create table statement of an existing table? : Sql dba

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What is trigger with example?

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What does count (*) mean?

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What are the qualities of 2nf?

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What is the use of function in sql?

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Write the command to remove all players named sachin from the players table.

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What does a pl/sql package consist of?

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