What is count * in sql?

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What is cte?

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what is a trigger in mysql? : Sql dba

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What does truncate mean in sql?

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What is the main difference between a UNION statement and a UNION ALL statement? 1. A UNION statement eliminates duplicate rows; a UNION ALL statement includes duplicate rows. 2. A UNION statement can be used to combine any number of queries; a UNION ALL statement can be used to combine a maximum of two queries. 3. A UNION statement can only combine queries that have parallel fields in the SELECT list; a UNION ALL statement can combine queries with differing SELECT list structures. 4. A UNION statement cannot be used with aggregate functions; a UNION ALL statement can be used with aggregate functions. 5. There is no difference between the two statements; they are interchangeable.

2 Answers   Saman Bank, Sonata,

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Why is sharding used?

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What is rule base and cost base optimizer?

2 Answers   Thermotech,

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wht is the difference between sqlaserver2000 and 2005

1 Answers   ABC, IBM,

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how to add a new column to an existing table in mysql? : Sql dba

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What is the command used to fetch first 5 characters of the string?

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how to show all tables with 'mysql'? : Sql dba

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If a cursor is open, how can we find in a pl/sql block?

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