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2. Query plan - Wikipedia

   en.wikipedia.org/wiki/Query_plan

   A query plan (or query execution plan) is a sequence of steps used to access data in a SQL relational database management system. This is a specific case of the relational model concept of access plans. Since SQL is declarative, there are typically many alternative ways to execute a given query, with widely varying performance.

3. Query optimization - Wikipedia

   en.wikipedia.org/wiki/Query_optimization

   The query optimizer attempts to determine the most efficient way to execute a given query by considering the possible query plans. [ 1 ] Generally, the query optimizer cannot be accessed directly by users: once queries are submitted to the database server, and parsed by the parser, they are then passed to the query optimizer where optimization ...

4. Hint (SQL) - Wikipedia

   en.wikipedia.org/wiki/Hint_(SQL)

   In various SQL implementations, a hint is an addition to the SQL standard that instructs the database engine on how to execute the query. For example, a hint may tell the engine to use or not to use an index (even if the query optimizer would decide otherwise).

5. Full table scan - Wikipedia

   en.wikipedia.org/wiki/Full_table_scan

   No index The optimizer must use a full table scan since no index exists. Small number of rows The cost of full table scan is less than index range scan due to small table. When query processed SELECT COUNT(*), nulls existed in the column The query is counting the number of null columns in a typical index. However, SELECT COUNT(*) can't count ...

6. No apps, no hacks. A guide to optimizing productivity - AOL

   www.aol.com/no-apps-no-hacks-guide-164416943.html

   If an app promised to make me smarter, faster or more efficient, I downloaded it. Time trackers, digital planners, habit trackers — you name it. I spent hours setting them up, convinced this one ...

7. Database tuning - Wikipedia

   en.wikipedia.org/wiki/Database_tuning

   Database tuning describes a group of activities used to optimize and homogenize the performance of a database.It usually overlaps with query tuning, but refers to design of the database files, selection of the database management system (DBMS) application, and configuration of the database's environment (operating system, CPU, etc.).

8. System Mechanic Software | 30-Day Free* Trial | AOL Products

   www.aol.com/products/utilities/system-mechanic

   Download System Mechanic to help repair and speed up your slow PC. Try it free* for 30 days now. ... Regular optimization can help improve your computer health and prevent wear and tear on your ...

9. System Mechanic - AOL Help

   help.aol.com/products/system-mechanic

   Restore power, speed and stability with over 200 critical tests and 50 tools using the go-to solution for ultimate PC performance and trouble-free computing.