Databases Interview Questions
Questions Answers Views Company eMail

how to i write the query 'NISHI' TO N I S H I

Attra, Metric Stream,

4 5819

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 2633

The table has 3 columns 4 rows. The output is which column has least null values( A COL SHOULD BE THE OUTPUT) Write the query plz. A B C ---------- 1 NULL 7 2 4 NULL NULL 5 NULL 3 NULL NULL

TCS,

1 2464

The table has 3 columns 4 rows. The output is which column has least null values( A COL SHOULD BE THE OUTPUT) Write the query plz. A B C ================ 1 NULL 2 NULL 3 4 NULL 5 6 7 NULL NULL O/P C = 2 4 6

TCS,

2 3150

difference between SQL and C

Indus Software Technologies,

1 2660

Why fastload support to empty table?

CTS,

1278

Teradata: How can we know the indexed column in a table?

CTS, HSBC,

1342

how to overcome kernel isssues

Fortune,

1148

how to restore particular schema from rman full backup?

HCL,

1278

user says the db performance is slow or yesterday the query runned 1min and today its taking 30 min. how to trouble shot or were to start with?

HCL,

1 2388

what is logical system in sap basis

1103

how to solve cardinality in dbms...many to many ralationships

1254

HI Friends I m new dev(forms & report). can anyone tell me how we upload a document on form 11g.??

Access Info,

1070

how to write a query without using where? Example- select * from employee where empno=10 I need to write this query without where clause.

Alshaya,

1 2484

How to display all Friday's in a year with date?

Flipkart,

4 5884


Un-Answered Questions { Databases }

How delete all data from table in sql?

548


Why do we need cursors in pl sql?

503


what is try_catch block in procedure

1168


What is subquery? Explain the properties of a subquery?

480


Should I use mbr or gpt?

514






Why plvtab is considered as the easiest way to access the pl/sql table?

595


What is user-defined functions? What are the types of user-defined functions that can be created?

546


How do you maintain a database?

482


What is normalisation and its type?

522


what is the full procedure for using store procedure in informatica7.1?

1794


What is a temporal data type?

573


What does it mean to normalize a database and why would you do it?

508


Mention how you can inspect the source code of a function?

1


What is implicit cursor in dbms?

520


If I use netlib, will I find many other users to network with?

472