what are the limitations of mysql in comparison of oracle? Mysql vs. Oracle. : Sql dba

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Why we use stored procedure instead of query?

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what is a unique key ? : Sql dba

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If i insert record in table A and these record should update in table B by using Trigger.How to achieve this.

4 Answers   Saama Tech, TCS,

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What is a loop in sql?

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what does it mean to have quoted_identifier on? What are the implications of having it off? : Sql dba

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Will truncate release space?

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What is the largest value that can be stored in a byte data field?

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HOW TO TUNE ORACLE SQL QUERIES GIVE ME STEP BY SREP

1 Answers   TCS,

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define sql delete statement ? : Sql dba

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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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When you have to use a default "rollback to" savepoint of plvlog?

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