What are some characteristics of columns that benefit from
indexes?
Answer / s
primary key, foreign key, Joins are often performed on
primary and foreign key columns. columns frequently coded
in the WHERE clause, ORDER BY, GROUP BY, DISTINCT, columns
which are searched or joined over less than 5-10% of the
rows.
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I have a main program (A) where we delete some rows in table in a cursor, and we commit it in sub program(B). What will happen - will we get an error or not?
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List out the data types available.
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