Ms sql group by with min or max

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MySQL :: MySQL 5.1 Reference Manual :: 12.17.1 GROUP BY (Aggregate) Functions

  http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html
But if it's not indexed, SQL would have to evaluate each row individually anyway.You can take the idea a stage further by using a WHERE clause on the query too. By using the LIMIT keyword, we can proceed directly to (at worst) a scan over half the values (also required where sequence numbers are assigned) to fetch the median value or the two middle values

sql - Optimizing large database query (25+ million rows, using max() and GROUP BY) - Database Administrators Stack Exchange

  http://dba.stackexchange.com/questions/75963/optimizing-large-database-query-25-million-rows-using-max-and-group-by
There is also DISTINCT ON as another possible query technique, but it's hardly going to be faster than your original query, so not the answer you are looking for

  http://www.brentozar.com/archive/2011/09/sysadmins-guide-microsoft-sql-server-memory/
Some of these changes (like AWE) will only take effect upon restart of the SQL Server service, while others (like decreasing Max Server Memory) will take effect instantly. I see a lot of SQL Servers running on boxes with just 4-16GB of memory, trying to support 100GB of databases, and the sysadmin just needs a quick, easy, and risk-free fix

Microsoft SQL Server - Lesson 37: Aggregate Queries

  http://www.functionx.com/sqlserver/Lesson37.htm
To start a summary query: Right-click somewhere in the middle window and click Add Group By On the View Designer toolbar, click the Add Group By button On the main menu, click View Designer, and click Add Group By This would add a new column titled Group By in the Criteria section. As a result, if you select (only) the one column that holds the information you want, in the resulting list, each of its categories would display only once

SQL TWIST - This Week in SQL Server Technology

  http://sqltwist.com/
If you ever needed to determine how many VLFs are within a database you can run DBCC LOGINFO from within the context database and the total number of rows returned would give you your VLF account. Essentially having too many VLFs can affect performance of any activity that reads from the transaction log such as Replication, AlwaysOn Availability Groups, Mirroring, Database Recovery etc

Using the GROUP BY Clause to Group SQL Query Results

  http://databases.about.com/od/sql/a/Group_By_SQL.htm
SQL also provides you with the ability to group query results based upon row-level attributes in order to apply aggregate functions using the GROUP BY clause

  http://www.microsoft.com/en-us/server-cloud/products/sql-server/
Faster insights on any data Get to insights faster with a complete BI platform that speeds up how you access, analyze, clean and shape both internal and external data. Back to top SQL Server 2014 in the news Gartner Read Gartner's Magic Quadrant for Advanced Analytics Platforms Read the story Gartner Read Gartner's Magic Quadrant for Business Intelligence and Analytics Platforms Read the story Gartner Read Gartner's Magic Quadrant for Data Warehouse and Data Management Solutions for Analytics 2015 Read the story TechRadar.pro Microsoft SQL Server 2014 review: The database heads into memory for Microsoft's latest release Read the review Back to top SQL Server blog Announcing Spark for Azure HDInsight public preview 10 Jul 2015 04:10 PM by T.K

  http://www.microsoft.com/en-us/server-cloud/products/sql-server-editions/
Learn more Standard SQL Server Standard provides core data management and business intelligence capabilities for non-critical workloads with minimal IT resources. Back to top Other editions Compact edition Microsoft SQL Server Compact edition is a free, embedded database that software developers can use for building ASP.NET websites and Windows desktop applications

  http://sqlmag.com/t-sql/max-and-min-aggregates-against-partitioned-tables
To address the original need to calculate the aggregate against the entire table, you can write a query against a table that holds all partition numbers (call it P) and use the APPLY operator to apply the logic presented in Query 3 to each row from P. The code creates a clustered index on col1, partitioned the same as the table by col1, as well as a nonclustered index on col2, also partitioned the same as the table by col1

  http://www.databasejournal.com/features/mysql/article.php/3469351/The-HAVING-and-GROUP-BY-SQL-clauses.htm
The result returned means nothing, and may not be consistent, as it depends upon the order the DBMS happens to have placed and found the record, so there is no point in running a query like this. Since the WHERE clause is carried out first, while the HAVING clause is carried out last, after all optimizations, it usually makes more sense to place a condition in the WHERE clause, and save the HAVING clause for conditions that are applied to fields, Changes to the HAVING clause in MYSQL 5.0.2 Older versions of MySQL allowed the HAVING clause to refer to any field listed after the SELECT statement

SQL Server: GROUP BY Clause

  http://www.techonthenet.com/sql_server/group_by.php
Description The SQL Server (Transact-SQL) GROUP BY clause is used in a SELECT statement to collect data across multiple records and group the results by one or more columns

  http://stackoverflow.com/questions/723054/extra-fields-with-sql-min-group-by
Will the employee name (and any other employee fields) be from the same row? Namely the row with the MIN(salary)? I know there could very possibly be two employees with the same (and lowest) salary, but all I'm concerned with (now) is getting all the information on the (or a single) cheapest employee

SQL: GROUP BY Clause

  http://www.techonthenet.com/sql/group_by.php
Description The SQL GROUP BY clause can be used in a SELECT statement to collect data across multiple records and group the results by one or more columns