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Join method: Given two tables and a join condition, multiple algorithms can produce the result set of the join. Which algorithm runs most efficiently depends on the sizes of the input tables, the number of rows from each table that match the join condition, and the operations required by the rest of the query. Many join-algorithms treat their ...
Saving SQL scripts in projects not affecting database; Database configuration with setting risk levels (Development database, production database) Data widgets (simple queries saved in database project, which are bind to some table, application than shows results of query while browsing table data) Database Jobs designer
2012-05-10 2.4.6 GPL: Yes Yes Yes Yes Yes Yes Yes No Yes Yes IBM Db2, HSQLDB, Apache Derby, H2: Java: HeidiSQL: Ansgar Becker 2022-08-13: 12.1 [3] GPL: Yes needs Wine: needs Wine: Yes Yes Yes Yes Delphi: Maatkit Baron Schwartz 2010-06-01 5247 GPL: Yes Yes Yes Yes Perl: Microsoft SQL Server Management Studio: Microsoft: 2024-07-09 [4] 20.2 ...
Microsoft SQL Server Management Studio (SSMS) is a software application developed by Microsoft that is used for configuring, managing, and administering all components within Microsoft SQL Server. First launched with Microsoft SQL Server 2005, it is the successor to the Enterprise Manager in SQL 2000 or before. The tool includes both script ...
In a SQL database query, a correlated subquery (also known as a synchronized subquery) is a subquery (a query nested inside another query) that uses values from the outer query. This can have major impact on performance because the correlated subquery might get recomputed every time for each row of the outer query is processed.
Conjunctive queries also correspond to select-project-join queries in relational algebra (i.e., relational algebra queries that do not use the operations union or difference) and to select-from-where queries in SQL in which the where-condition uses exclusively conjunctions of atomic equality conditions, i.e. conditions constructed from column ...
Query plans for nested SQL queries can also be chosen using the same dynamic programming algorithm as used for join ordering, but this can lead to an enormous escalation in query optimization time. So some database management systems use an alternative rule-based approach that uses a query graph model. [7]
Monitoring tools may show the database resources — usage summary, service time summary, recent activities, top sessions, session history or top SQL — in easy-to-read graphs. Database administrators can easily monitor the health of various components in the monitoring instance. Application developers may also make use of such tools to ...