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Advanced SQL

Advanced SQL
With the UNION clause, each query involved must output the same number of columns, and they must be UNION compatible.

False
True

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Advanced SQL
A correlated subquery is where the outer query depends on data from the inner query.

False
True

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Advanced SQL
Triggers are stored blocks of code that have to be called in order to operate.

False
True

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Advanced SQL
The UNION clause is used to combine the output from multiple queries together into a single result table.

True
False

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Advanced SQL
Which of the following statements is true concerning routines and triggers?

Both run automatically.
Both consist of procedural code.
Both are stored in the database.
Both have to be called to operate.

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Advanced SQL
Outer join is the same as equi-join, except one of the duplicate columns is eliminated in the result table.

True
False

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