What is a call statement? Explain with an example.

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Can a table have no primary key?

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How do you create a unique index?

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What is record type in pl sql?

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what is the difference between nested subquery and correlated subquery?

0 Answers  

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Differences between Oracle 9i and 10g (Probably in terms of SQL and PL/SQL)?

0 Answers   IBM,

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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;

2 Answers  

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From an Employee table, how will you display the record which has a maximum salary?

29 Answers   Cap Gemini, Exilant, Synechron,

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what are the advantages of sql ? : Sql dba

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What is Histogram?

0 Answers   NIIT,

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what is oracle sql,pl/sql with interfaces

2 Answers   TCS,

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What is a primary key sql?

0 Answers  

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