What is control file used for?
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how can get like this result table A col1 col2 --- ----- a A b B C C .. .. .. ... .. ... wants result like for a single column col1 ------ a,b,c,........n of data and another is col1 ------- A B C D ........ a b b d ........
What is the exact use of Collections?
There are three tables : E : EID,ENAME D : DID,DNAME empdept : eid, did select the employees who doesn't belong to any dep
Explain integrity constraint?
how to convert .db (extention) database file into .dmp (extention ) for oracle database ?
What are the advantages of Views ?
Typically, where is the conventional directory structure chosen for Oracle binaries to reside?
1. Display the post code and the purchase order number for each purchase order. Sort the output set by postcode.
How do I decide when to use right joins/left joins or inner joins or how to determine which table is on which side?
What do you understand by a database object? Can you list a few of them?
Query to retrieve record for a many to many relationship ?
7. Repeat query (7) but also display all clients who have never ordered anything.