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SQL EXISTS condition

If a subquery returns at least one line, the SQL EXISTS condition is used with it and is said to be satisfied. The SELECT, INSERT, UPDATE, and DELETE …

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SQL ALTER TABLE statement

A table’s columns can be altered, added, or removed using the SQL ALTER TABLE statement. A table can also be renamed using the SQL statement ALTER TAB…

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Improve something with hints and bits

PostgreSQL is a highly developed relational database system that performs incredible operations. But sophistication also means that there is a level o…

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A Post-Grass Bloom Index Experience

Therefore, in order to begin, we would first require a test case that was “close to real life” in order to help us better understand and remember the …

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YOUR OWN AGGREGATION FUNCTIONS, WRITTEN

“Aggregate functions” are something that many people who have used PostgreSQL or SQL in general professionally or semi-professionally have run into. T…

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