Databases Interview Questions
Questions Answers Views Company eMail

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

Metric Stream, Attra,

4 3755

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 1300

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 1377




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 1810

difference between SQL and C

Indus Software Technologies,

1 1557

Why fastload support to empty table?

CTS,

585

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

CTS, HSBC,

689

how to overcome kernel isssues

Fortune,

519

how to restore particular schema from rman full backup?

HCL,

714

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 1114

what is logical system in sap basis

433

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

683

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

Access Info,

437

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 1169

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

Flipkart,

3 2688







Un-Answered Questions { Databases }

I have following column in the table. col1 1 a b c 2 3 d and I want to display it as num chars 1 a 2 b 3 c 4 d numbers in one column and letters in another column.

171


Pgm A calls Pgm B and pgm B uses cursor, when pgm B is called second time, the program is abending saying the cursor is opened? Why?

1257


what is single byte over head in oracle..?

1245


how to do daily transactions with out sql* loader control file regesterd in apps?

480


when MSQL8.0 is in market

914






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

1163


can anyody please send me the dump for Oracle 10g certifications for DBA path?

1004


Why Update is too slow

399


How to clone the database using RMAN back

858


What is AUTH_ID and AUTH_USER in pl/sql ?

691


IF Statements BLOCK 1 . IF a >= b THEN do_this …..; ELSE do_that….; END IF BLOCK 2 . IF a < b THEN do_that …..; ELSE do_this….; END IF; • Given any pair of non-NULL values for “a” and”b”, will Block 1 and Block 2 do the same thing? • What if either “a” or”b” (or both) is NULL?

1147


How to use online Backups?

1023


HI, Please let me know the syllabus for Oracle OCA and OCP Certification

1282


wHat Is THE difference between MOVEL and MOVEL(P)……….. CAN ANYONE EXPLAIN ME..

1493


I got an error SQL1042C. An unexpected system error occurred. Explanation: A system error occurred. One possible reason for this error is that the database manager is not installed correctly or the environment is not set up correctly. On OS/2, while trying to start the database manager, a very common reason for this error is a corrupted NET.ACC file. The command cannot be processed. The tables and views would not be opened. What is the way to open the dataase? pls help me

3065