What is indexing, and how does it improve performance?
Indexing creates a data structure that speeds up data retrieval operations. It reduces the number of disk accesses required for queries. However, too many indexes can slow down INSERT, UPDATE, and DELETE operations.
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How to divide query output into groups in oracle?
i can't insert column value greater than 4000 characters at one instance even i am using CLOB datatype . how to insert efficiently more than 4000 characters ? And please let me know how to impose inline and out-of line constraints on oracle column??? Thanks in Advance... Prakash
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Using the relations and the rules set out in the notes under each relation, write table create statements for the relations EMPLOYEE, FIRE and DESPATCH. You should aim to provide each constraint with a formal name, for example table_column_pk.
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