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1) In a dataset how to delete a single row?
2) i have 50 rows , i want to display 5-7 records only?
How to write the sql query?
3)i have 40 rows,i want to display last row? write sql query?

Answers were Sorted based on User's Feedback



1) In a dataset how to delete a single row? 2) i have 50 rows , i want to display 5-7 records only?..

Answer / segu satish

answer for 3rd question:

select * from emp where rowid =(select max(rowid) from emp)

Is This Answer Correct ?    13 Yes 1 No

1) In a dataset how to delete a single row? 2) i have 50 rows , i want to display 5-7 records only?..

Answer / srinu

1) using external filter we use command is sed we get
2)select * from (select rownum rno,emp.* from emp)
where rno in(5,6,7)
or
select * from (select rownum rno,emp.* from emp)
where rno between 5 and 7
or
select * from emp where rownum<8
minus
select * from emp where rownum<5
in first two are very efiiciency compare to third one
because in third iam using set operator
3)select * from emp where rowid=(select max(rowid) from emp);

Is This Answer Correct ?    11 Yes 0 No

1) In a dataset how to delete a single row? 2) i have 50 rows , i want to display 5-7 records only?..

Answer / reddy obul

__for 2nd question answer is:
select * from table where rowid<8 minus select * from table
where rowid<5
__for 3rd quesion answer is:
select * from emp where rowid in(select max(rowid) from emp)

Is This Answer Correct ?    9 Yes 9 No

1) In a dataset how to delete a single row? 2) i have 50 rows , i want to display 5-7 records only?..

Answer / sarath

for 2nd:
select * from table where rownum<8 minus select * from table where rownum<5;

Is This Answer Correct ?    4 Yes 4 No

1) In a dataset how to delete a single row? 2) i have 50 rows , i want to display 5-7 records only?..

Answer / ravi

1 answere : we can use @rownum =1 and reject the first record....

Is This Answer Correct ?    0 Yes 0 No

1) In a dataset how to delete a single row? 2) i have 50 rows , i want to display 5-7 records only?..

Answer / subbu

2nd answer:

select * from(select rowid from tablename where rowid between 5 and 7);

Is This Answer Correct ?    0 Yes 2 No

1) In a dataset how to delete a single row? 2) i have 50 rows , i want to display 5-7 records only?..

Answer / ritesh chatterjee

Answer to Qust 1

Sed 1d "Dataset Name" from unix by this way you can delete
1st record from dataset,in place of 1 you can place any number.

Answer to Question 2

select * from tablename
where rowid between 2 and 7;

Answer to 3rd qus:-

select * from tablename
where rownum = 40;

Is This Answer Correct ?    0 Yes 3 No

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