what is the need of the cursor attribute notfound..(because using found attribute we can complete the task......found + negation operator = not found )

2 Answers   Tech Mahindra,

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what is unique key constraint? : Sql dba

0 Answers  

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how a reference cursor works?what all adnvantages are gained with it..specify the situation?

4 Answers   TCS,

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What is the difference between truncate and drop statements?

0 Answers  

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What is different between union and minus?

7 Answers   Accenture, TCS,

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What is primary key and foreign key?

0 Answers  

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What is execute immediate?

0 Answers  

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Compare SQL and PL/SQL.

3 Answers  

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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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What is insert command in sql?

0 Answers  

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Can we use out parameter in function?

4 Answers   Infosys,

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Question: Below is the table city gender name delhi male a delhi female b mumbai male c mumbai female d delhi male e I want the o/p as follows: male female delhi 2 1 mumbai 1 1 Please help me in writing the query that can yield the o/p mentioned above?

2 Answers  

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