What is sql query optimization?

0 Answers  

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My select statement is not working as expected, So, to overcome from such issues what are the steps needed to be taken care?

2 Answers   CG,

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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.

2 Answers  

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What is rank function in sql?

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What is materialized view in sql?

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what is commit? : Sql dba

0 Answers  

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What is execution plan in sql?

0 Answers  

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Why cross join is used?

0 Answers  

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What is the largest value that can be stored in a byte data field?

0 Answers  

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How does one load ebcdic data? : aql loader

0 Answers  

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what is unique key constraint? : Sql dba

0 Answers  

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write a qurey for finding the length of the sting.

6 Answers   Infosys, TCS,

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