What is an alias command?

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What is relationship? How many types of relationship are there?

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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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how to insert the data through views? The view is depending upon more than two tables? how to update materalized views?

3 Answers   3i Infotech,

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Can we call a function containing dml statements in a select query?

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What is the use of function in sql?

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Can primary key be changed?

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Can a composite key be null?

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Why sql query is slow?

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difference between anonymous blocks and sub-programs.

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What programs use sql?

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How can u find column name from a table which have max value in a row.( not max value)

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