Maximum how many triggers can we use in trigger and How to find out how many records it fetched.

1 Answers   TCS,

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Is left join faster than inner join?

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How do I copy a table in sql?

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What are the different set operators available in sql?

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What is view? Can we update view

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Is full outer join same as cross join?

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How to select random rows from a table?

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what are myisam tables? : Sql dba

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How to retrieve a second highest salary from a table? Note:Suppose salaries are in duplicate values eg: Name Sal Malli 60000 Pandi 60000 Rudra 45000 Ravi 45000

10 Answers   Mind Tree, Polaris, Sonata,

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Do we need to create index on primary key?

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Hi Guys, I have a situation where I need to access the column values from rowtype variable. However, the column names are dynamic. below is sample code: declare Cursor c1 is select * from emp; Cursor c2 is select column_name from xyztable; v_c2 c2%rowtype; v_str varchar2 v_value varchar2(200); begin for rec in c1 loop open c2;---this cursor has column names like EMPLOYEE_ID, FIRST_NAME, LAST_NAME etc. loop fetch c2 into v_c2; exit when c2%notfound; /* now lets say i want to access value of LAST_NAME from cursor c1, so I am writing below code, however it does not work as expected */ v_str:= 'rec.'|| v_c2.column_name; -- this will give me string like "rec.EMPLOYEE_ID" v_value:=v_str; end loop; end loop; end; / Plz help ASAP.Thanks.

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what are numeric data types? : Sql dba

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