Delete duplicate records in the emp table.
Answers were Sorted based on User's Feedback
Answer / 14-07-2007
delete from emp where rowid not in(select min(rowid) from
emp group by empno;
| Is This Answer Correct ? | 13 Yes | 2 No |
Answer / smriti
delete from tablename a where a.rowid>(select min(rowid)
from tablename b where a.columnname=b.columnname)
| Is This Answer Correct ? | 8 Yes | 1 No |
Answer / srinivas ganamur
Delete from table t1
where t1.rowid>(select from table t2
from table t2
where t1.col_name=t2.col_name);
Srinivas Ganamur
Bangalore
| Is This Answer Correct ? | 7 Yes | 3 No |
Answer / ch. nageswar subudhi
For delete the DUPLICATE RECORD from Table by using this
Query:
DELETE FROM EMP E
WHERE E.ROWID <>(SELECT MIN(ROWID) FROM EMP E2 WHERE
E.EMP_NO=E2.EMPNO);
| Is This Answer Correct ? | 4 Yes | 3 No |
Answer / amedela chandra sekhar
delete from emp x where rowid>(select min(rowid) from emp
where rmpno=x.empno);
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / valli
delete from emp where rowid in(
select rowid from (
select emp_no, sal,rownum() over (emp_no,sal) as
Rownum from emp order_by emp_no,sal
) where rownum > 2
)
| Is This Answer Correct ? | 1 Yes | 4 No |
Differentiate between syntax and runtime errors.
What is pl sql commands?
Maximum how many triggers can we use in trigger and How to find out how many records it fetched.
what is check constraint? : Sql dba
Can I call a procedure inside a function?
What is dynamic query?
What is a string data type in sql?
What if we write return in procedure?
Are stored procedures compiled?
Explain the uses of control file.
how can we encrypt and decrypt a data present in a mysql table using mysql? : Sql dba
How many sql statements are used?
Oracle (3253)
SQL Server (4518)
MS Access (429)
MySQL (1402)
Postgre (483)
Sybase (267)
DB Architecture (141)
DB Administration (291)
DB Development (113)
SQL PLSQL (3330)
MongoDB (502)
IBM Informix (50)
Neo4j (82)
InfluxDB (0)
Apache CouchDB (44)
Firebird (5)
Database Management (1411)
Databases AllOther (288)