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1. 15:49:23 ORA-01002: fetch out of sequence the number of records to be fetch is incorrect (for example, there are 8 records but 9 records are fetch) PS: . is commit; cause error when you open a cursor with for update, the system will apply exclusive lock to the retrieved data ), before the lock is released, other users cannot update, delete, or lock these records. once I execute commit, the lock is released, the cursor becomes invalid, and an error occurs when I fetch the data. theref
---- Set a non-primary key to clustered index [Step 4] to: http://king123654789.iteye.com/blog/1169191 1. View All indexes. Clustered indexes are created on the primary key by default.Sp_helpindex person 2. -- delete the primary key constraint and remove the index constraint on the primary key queried in [1], for example, PK _ person _ 117F9D94. Remove the primary key constraint from the primary key field. This field is not the primary key.Alter table person drop constraint PK _ person _ 117F9
Difference between SQL Server table variables and temporary tables (Supplement), SQL Server I. Table Variables Table variables are introduced in SQL Server 2000 for the first time. Table variables include column definitions, colum
, StartDate)SELECT CAST(N.n AS VARCHAR(max)) + 'JeffckyWang', DATEADD(DAY, (N.n - 1) % 31, '20140101')FROM dbo.Nums AS NWHERE N.n >= 1 AND N.n If we need to obtain SomeValue = 'jeffckywang' in the TestData table, we want to create a non-clustered index on SomeValue and then filter it, as shown below: USE TSQL2012GOCREATE NONCLUSTERED INDEX idx_noncls_somevalueON dbo.TestData(SomeValue)WHERE SomeValue = 'JeffckyWang' Update SQL
Platform Description: Two SQL SERVER2005 servers with two identical databases installed on top of each otherRecently, because of the project needs, you need to copy the database on one of the servers on a database on another server, after a lot of Google has finally finished, here to do a detailed record, hoping to help everyone and themselves.One, the first step: SQL
SQL Server performance optimization skills, SQL Server Performance Optimization 1. Select the most efficient table name sequence (only valid in the rule-based Optimizer) The SQL Server parser processes the table names in the FROM
If you establish a connection server with a 32-bit database server on a 64-bit computer and use the connection server for Distributed queries on 64-bit computers, the following error message is returned: Server: Message 7399 , Level 16 , Status 1 , Line 1 Ole db Provider ' Sqloledb ' Reported an
Tags: Audit SQL ServerIntroductionAudit is a feature after SQL Server 2008 that tells you "who did what when?" Specifically, auditing an instance of the SQL Server database engine or a separate database involves tracking and documenting events that occur in the database engi
Label:An error occurred while establishing a connection to the server. When you connect to SQL Server 2005, SQL Server does not allow remote connections under the default settingsSQL Server se
Introduction Audit is a feature after SQL Server 2008 that tells you "who did what when?" Specifically, auditing an instance of the SQL Server database engine or a separate database involves tracking and documenting events that occur in the database engine. Its bottom-level is based on extended events (Extented event),
MS SQL Server Query optimization methodThere are many reasons for the slow speed of queries, which are common1, no indexes, or no indexes (this is the most common problem with query slowness, is the flaw in programming)2, I/o throughput is small, creating a bottleneck effect.3, no computed columns are created causing the query to be not optimized.4, Low memory5, network speed is slow6, query out the amount
Steps: Check whether the IP address of the ping server can be pinged. This is to see whether the physical connection to the remote SQL Server 2000 Server exists. If not, check the network and check the configuration. Make sure that the IP address of the Remote SQL
Connect to the SQL server lock mechanism (I)-Overview (lock type and scope) Ii. Complete lock compatibility matrix (see) Correct Code Description: see. III. The following table lists the resources that can be locked by the database engine. Name Resources Abbreviations Encoding Specifies the method to describe the resource when a lock is presented. Description Data row
SQL Server connection Server Technical Summary, SQL Server 1. Use Microsoft ole db Provider For ODBC to link MySQL Install MySQL ODBC driver MyODBC 1. Create an ODBC data source for MySQL. For example, set database to test and data source name MyDSN 2. Create a linked Databa
SQL Server Stored Procedures and SQL Server Stored Procedures Stored Procedures in Transact-SQL are very similar to methods in Java. They can be called repeatedly. After the stored procedure is executed once, you can cache the statements so that the statements in the cache a
11. Microsoft SQL server network settingsOverview of Network ServicesSQL Server application interfaceNetwork Connection LibraryNetwork components and SQL server performanceNetwork MonitoringSummaryAfter you install Microsoft SQL
SQL Server complex SQL logic implementation, SQL Server SQL Logic I. Problems For example, if you already have data in tables a and B, how can you convert it to Table c through SQL stat
improve query efficiency, we must also pay attention to its cost Indexes require space for storage and regular maintenance, and the index itself is modified whenever a record is added or subtracted from the table or the index column is modified This means that the insert, DELETE, and update for each record will pay 4 or 5 more disk I/O Because indexes require additional storage space and processing, unnecessary indexing slows query response times SQL
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or could not be accessed. Verify that the instance name is correct, and that SQL Server is configured to allow remote connections. When you use the G
Today to query their own installed sqlserver2008 is R2 version, search the next, found that a lot of people query this problem, now recorded as follows, through the version of the command queryAlso understand the older brother SQL Server version of the good, a look is very clear, record 1. View SQL Server 2005/2008 ve
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