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SQL

SQL - INNER JOINS

join inner-join

SQL

Correlated subquery

sub-queries correlated-subquery synchronized-subquery

SQL

CARTESIAN JOIN or CROSS JOIN

join cross-join inner-join

SQL

The SQL UPDATE Statement

SQL

SQL Aggregate Functions

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

SQL

The DROP INDEX Statement

MySQL SQL-server DROP-statement Oracle DROP-INDEX MS-Access DB2

SQL

SQL - ORDER BY Clause

ORDER-BY-clause

SQL

SQL HAVING Example

HAVING-clause COUNT-Function aggregate-functions

SQL

NVL2

NULL-values General-Functions NV2

SQL

Phantom reads

range-locks phantom-read isolation transactions non-repeatable-reads

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