Important topics to study

• Normalize many to many relationships
• Difference - Equijoin and union
• What is TEMP table space in Oracle, what is rollback segment
• How do we find row chaining?
• Pattern matching operators
• Features in oracle 9i and 10g
• Why truncating table is faster than delete
• copy commit syntax
• Convert Zulu time zone to US Eastern time zone
• Difference - union and union all
• Difference - Group by, Order by clause
• Which Ranking functions are available?
• Difference - Decode, NVL, NVL2
• Tradeoffs of using partitioned tables
• How can we call stored procedure in SQL query
• What are the restrictions on calling PL/SQL from SQL
• Why EXISTS is preferable to distinct
• Give 2 examples of avoiding unnecessary parsing.

PL SQL Questions:

How do you convert a date to a string?
What is an aggregate function?
What is the dual table?
What are cursors? Distinguish between implicit and explict cursors?
Explain how cursors are used by Oracle?
What is PL/SQL? Describe the block structure of PL/SQL?
What is a nested subquery?
What are the various types of queries ?
Which of the following is not a schema object : Index, table, public synonym, trigger and package ?
What is dynamic sql in oracle?
What is the difference between a package, procedure and function
What is the difference between delete, drop and truncating a table
How many triggers are supported in Oracle
Are you aware of FLASHBACK concept ? What is it?
Describe oracle’s logical and physical structure?
What is data dictionary
What is the use of control files
How would store XML data in table ? What data type would be used for the columns?
Difference between post and commit?
Difference between commit and rollback?
What are savepoints?
Difference between a View and Synonym
How would you fetch system date from oracle
What is the difference between primary key, unique key, foreign key?
What is the difference between NO DATA FOUND and %NOTFOUND
What is cursor for loop
What are cursor attributes
What will you use in Query : IN or EXISTS? Why
Explain the difference between a data block, an extent and a segment.
What’s the difference between logical and physical I/O?
What is an anonymous block?
What is a PL/SQL collection?