query-tuning

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Cost of a query in/dependent of amount of data

Could you please tell me whether the cost of a query is dependent on the amount of data available in the databas开发者_如何学Goe at that time?[详细]

2023-04-12 18:49 分类：问答
Slow performing query, looking for ideas for solution

I\'m using SQL Server 2008. I have a view called testView In the view one of the columns is using another query taken from this page - http://www.simple-talk.com/sql/t开发者_高级运维-sql-programmin[详细]

2023-03-26 05:13 分类：问答
Best way of benchmarking INSERTs - all inclusive?

If I would like to benchmark how different table definitions affe开发者_如何学编程ct row insertion speed in SQL Server, I guess it\'s not sufficient to just time transaction from BEGIN to COMMIT: this[详细]

2023-03-21 10:24 分类：问答
retrieve SET STATISTICS IO and SET STATISTICS TIME values via ADO.NET?

When executing T-SQL queries via Management Studio, I can use SET STATISTICS IO ON and SET STATISTICS TIME ON to capture statistics for query tuning.[详细]

2023-02-11 19:25 分类：问答
What is wrong with this stored procedure?

I need to do tuning on this sp: alter PROCEDURE Gaming.usp_DB_GetGameResultsByDateTime (@FromDateTime AS DATETIME2(7) = null ,[详细]

2023-02-03 12:18 分类：问答
Query temp space limit in Oracle

I want to run a query which takes a lot of temp space. However, I don\'t want the query to exhaust开发者_如何学C all the available temp space. How can this be achieved?You can add a resource plan that[详细]

2023-01-27 20:17 分类：问答
Create Index on partial CHAR Column

I have a CHAR(250) column being used as a foreign key to a varchar(24) column. In MySQL I recall that I could create an index specifying column(24) in order to create an index on the leftmost 24 char[详细]

2023-01-21 22:42 分类：问答
SQL Query Theory Question

I have a large historical transaction table (15-20 million rows MANY columns) and a table with one row one column.The table with one row contains a date (la开发者_运维技巧st processing date) which wil[详细]

2022-12-31 10:21 分类：问答
石林一日游多少钱啊？石林一日游多少钱？

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2022-12-20 02:11 分类：问答
SQL Server Query Returning Multiple Rows

I am currently working on a SSIS package that is extracting a table from one database to another.The tables in both of the databases use the same column as the primary开发者_开发问答 key.My select sta[详细]

2022-12-20 01:00 分类：问答