How to add a column ‘salary’ to a table employee_details?

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What is procedure function?

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What is break?

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What information is needed to connect sql*plus an oracle server?

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How many rows can sqlite handle?

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What is index example?

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What is the difference between sql, mysql and sql server?

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What are analytic functions in sql?

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What is cursor status?

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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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What is sql architecture?

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Is sql better than excel?

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