NULL-values

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Given the Persons table: +-----+--------------+-------+ | Id | Fir...

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Given Clients table +------+--------------+----------+ | ID | Name...

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Given an empty table that was created using the query: CR...

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What data will the following query return: SELECT DI...

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Given table: CREATE TABLE employee (id integer NOT NULL, department_i...

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Given Products table +--------+-----------+ | ID | ...

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Pick all INSERT statements that will work correctly for the following table: ...

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Is CAST function used in SQL-expressions that use UNION?...

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COUNT() Function