Can a primary key contain more than one columns?
Answers were Sorted based on User's Feedback
How to write a query with a full outer join in oracle?
What SQL query from v$session can you run to show how many sessions are logged in as a particular user account?
What is the function of Redo Log ?
What is null value in oracle?
which institute and which faculty is providing best training for oracle sql, plsql in hyderabad
I just want to maintain data like an employee can belongs to 3 or more departments . We can resolve this by using composite key but it avoids normalization rules. So Can anyone tell me how can I maintain data.
What are the types of synonyms?
Explain the use of consistent option in exp command.
can you explain performance tunning in oracle(sql,PL/SQL)
consider some table with 4 r 5 columns in that 1 col is DATE type. The data is like that,For each date in that col some 3 fields r there but all the records r having different data. Now i want to display all the columns by performing grouping on the date field ( as SELECTION Operator(*) cannot be used with group function having only one "group by clause". how to do this? can any one help me in finding out the solution plss?
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 the is the diff between local index and global index. give some example.