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Snippets

SQL

SELECT ROWNUM example

SQL

NULLIF

NULL-values General-Functions NULLIF

SQL

INNER JOIN example

join cross-join inner-join

SQL

SQL PRIMARY KEY Constraint

NULL-values unique-key primary-key constraints

SQL

Correlated subquery

sub-queries correlated-subquery synchronized-subquery

SQL

SQL - ORDER BY Clause

ORDER-BY-clause

SQL

The TRUNCATE TABLE Statement

SQL

INSERT Query

INSERT-statement

SQL

SQL Aggregate Functions

COUNT-Function FIRST-Function SUM-Function AVG-Function aggregate-functions MAX-Function LAST-Function MIN-Function

SQL

The HAVING Clause

HAVING-clause GROUP-BY-clause aggregate-functions

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