State the difference between a primary key and foreign key?
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Is there an oracle sql query that aggregates multiple rows into one row?
In Oracle Clinical 4.5.0, can the VIEW_TEMPLATE_ID column in DATA_EXTRACT_VIEWS table contain NULL value?
How do we know whether an index is created on a table ???
What is the effect of setting the 'RULE' for OPTIMIER_GOAL parameter of the ALTER SESSION Command ?
1) What is ONE_SIZE_FITS_ALL approach? 2) Explain the Common & Variable Header of DATA FILE? 3) What are the Drawbacks to using OMF DB? and the Advantages? 4) List out the Advantages of Undo T.spaces over the Undo SEGMENT? 5) Difference between the Temporary tablespace with TEMPFILE and the Tablespace with TEMPORARY Keyword? 6) What are the situation extents are freeing for reuse.
What is the exact use of Collections?
What is an oracle data file?
Who i will insert 1 lacks record in a Database table
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 is trigger associated with the timer ?
How do I use unicode codesets with the weblogic jdriver for oracle driver?
can you write commit in triggers?