clustered-index

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SQL Server Indexes - Non-Clustered Index on HEAP

We have got 221gb table in our SQL Database, mainly duplicate data. Team has created NON-CLUSTERED index on HEAP. Does really this help in terms of performan开发者_如何转开发nce?[详细]

2023-04-10 20:41 分类：问答
Is clustered indexes implemented in mysql?

Why开发者_C百科 is this code not working? Is it because clustered indexes is not implemented in MySQL?[详细]

2023-04-07 12:58 分类：问答
Create clustered index and/or partitioning on non-unique column?

I have a table containing log entries for a single week for about a thousand web servers. Each server writes about 60,000 entries per day to the table, so there are 420,000 entries per week for each s[详细]

2023-04-01 18:10 分类：问答
SQL Azure not recognizing my clustered Index

I get the following error when I try to insert a row into a SQL Azure table. Tables without a clustered index are not supported in this version of[详细]

2023-03-31 14:32 分类：问答
NewSequentialId on UniqueIdentifier Clustered Index

I am working on database standards for a new database my company is starting.One of the things we are trying to define is Primary Key and Clustered Index rules in relation to UniqueIdentifiers.[详细]

2023-03-26 02:56 分类：问答
Why does SQL Server use a non-clustered index over the clustered PK in a "select *" operation?

I\'ve got a very simple table which stores Titles for people (\"Mr\", \"Mrs\", etc). Here\'s a brief version of what I\'m doing (using a temporary table in this example, but the results are the same):[详细]

2023-03-25 08:57 分类：问答
Clustered and nonclustered indexes performance

I have a huge table (~ 10 million row开发者_如何学Pythons) with clustered PK on a random uniqueidentifier column. The most operations I do with this table is inserting a new row if there is not yet a[详细]

2023-03-22 11:22 分类：问答
Primary key is bigint and identity, any reasons for preferring non clustered index over clustered index

I\'ve a table which is defined like this CREATE TABLE [dbo].[MyTable]( [MyTableId] [bigint] IDENTITY(1,1) NOT NULL,[详细]

2023-03-22 00:09 分类：问答
Using GUID as PK in big partitioned MySQL table

We have a huge InnoDB table with hundreds of millions of rows and only 3 columns: GUID, enum, smallint.[详细]

2023-03-14 22:39 分类：问答
DELETE performance in SQL Server on clustered index, large table

I have a table with more than 20 million rows, and when i do: DELETE [Table] WHERE ID = ? It takes over 40 seconds. The ID column is clustered.[详细]

2023-03-14 14:42 分类：问答