Difference between SUBSTR and INSTR?

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Explain what is dbms?

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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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Does sql*plus have a pl/sql engine?

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Does pdo prevent sql injection?

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what is the use of anchoring object? what r the difference between anchoring object & enclosing object? can any one tell me all the details?

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what are the different type of normalization? : Sql dba

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What are views in sql?

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diff b/w sub query and co-relater query?

3 Answers   iFlex,

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what are the advantages of primary key over unique+notnull

7 Answers   Consultancy, LGS, Oracle,

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suppose we have a table in which 200 rows. i want to find 101 row ? what the query.... and how we find 4th and 5th highest salary and 1 to 10 highest salary

7 Answers  

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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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