How to fetch values from testtable1 that are not in testtable2 without using not keyword?

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Is id a reserved word in sql?

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What is the life of an sql statement?

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What is a trigger ?

11 Answers   Accenture, BirlaSoft,

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how to analyze tables with 'mysqlcheck'? : Sql dba

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How to start oracle sql developer?

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What are the cursor attributes used in PL/SQL ?

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How to run sql*plus commands in sql developer?

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How do you update a table in sql?

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Given two tables Student(SID, Name, Course) and Level(SID, level) write the SQL statement to get the name and SID of the student who are taking course = 3 and at freshman level.

9 Answers   Oracle,

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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 the difference between the conventional and direct path loader? : aql loader

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