dynamic query in sql server

Label:It is understood that the vast majority of developers understand the index is smattering, limited to the majority of daily work without opportunities, and what is not necessary to care about the index, it is a query is too slow to find the query criteria to build an index OK, which day and a query slow, and then build an index is, Or simply the entire

: Win2003Start-> Settings-> Control Panel-> admin tools-> Data Source (ODBC)-> add-> Select SQL Server-> fill in the appropriate data (the server does not need to fill out the port number)-> Select Client Configuration "-> Cancel the dynamic decision port" (default is 1433, now you change it anyway)Speaking of which, I

****1924Zxxx@XXXX. com7601John Doe xxxx1873****2309LXXX@XXXX. com5583Harry xxxx1537****8234Wxxx@XXXX. com3190Sixgod xxxx0083****3642Sxxx@XXXX. com2, e-mail () This function only shows the first e-mail and @, all other use X to mask3, Random (1000,9999) displays the value from the 1000~9999 generated from the stochastic integer mask4, partial equivalent to the custom mask mode, the format (prefix reserved digits, mask string, suffix number of reserved digits) This format to createDoes that mean y

Label:Original: SQL Server Tuning Series advanced (how the query optimizer runs)ObjectiveIn the previous articles, we introduced a series of basic descriptions of operators and the optimization methods and techniques for each operator. This includes a series of our common operators, including how to view execution plans, how several datasets are commonly used, ho

Label:I've often been asked this question repeatedly: "I have a poorly performing SQL Server." How do I find the worst performance query? “。 So in today's article there are some information and wizards that make it easy to find answers to your questions. Ask SQL server! One

successful, D-recovey for MS SQL Server can sometimes read out the data in the MDF data file. Let's describe some of the data recovery features of D-recovey for MS SQL Server.Let's take a look at some of the database corruption scenarios:1, due to power outages and other causes of database query, this is a more common

In addition, EXEC () can also break through this restriction, as mentioned in inside SQL server t-programming: Concatenating VariablesIn SQL Server 2000, EXEC had an advantage over sp_executesql in terms of supporting longer input code. even though technically sp_executesql's input code string was of an NTEXT datatype,

Perhaps the most common error found in application code is a query request that uses a non-parameter special query to request data from the database instead of a prepared query or program. If you do not prepare your query or do not use the stored procedure, unnecessary SQL

stored procedure. In particular, do not use nested views. nested views increase the difficulty of searching for original data. Let's look at the nature of the View: it is stored on the server. The optimized SQL query plan has been generated. When retrieving data from a single table, do not use a view pointing to multiple tables. You can retrieve or read the view

Label:Paging Query for sqlserver2005 SQLSERVER2005 has been using the top keyword to achieve paged query, but inefficient, in the sqlserver2005 and later versions of the use of row_number () parsing function to complete the paging query, the efficiency has been greatly improved, but the SQL statement is more complex, T

As a small program ape, in the daily development can not avoid to and where in and like to deal with, in most cases we pass the parameters of simple quotes, sensitive word escape directly after the SQL, execute the query, fix. If one day you inevitably need to improve SQL query performance, need a one-time where in hun

Release date:Updated on: Affected Systems:IBM Informix IDS 11.70IBM Informix IDS 11.50Description:--------------------------------------------------------------------------------Bugtraq id: 56857CVE (CAN) ID: CVE-2012-4857 IBM Informix Dynamic Server provides an online transaction processing database for enterprises to run their businesses. IBM Informix Dynamic

XML query in SQL Server: For XML specify Auto Objective In SQL Server, an XML query can specify Raw,auto,explicit,path. This article introduces some examples of XML queries that specify auto in

In the previous article, wherein and like implementation of SQL Server parameterized query describes several Implementation Solutions for SQL Server parametric query of wherein. xml and Table value parameters are omitted. Here is

For a slow query, we usually need to know which steps are expensive first, and then try some improvement methods. In general, if you cannot solve the problem by improving the hardware performance or adjusting the OS or SQL server settings, the remaining options are usually the following:1. Add the index of the corresponding field for the "scan" operation.2. Somet

Query optimization on SQL statements. The foreground application works on the database server, and ultimately relies on the SQL statements in the application. According to incomplete statistics, SQL statements consume about 80% of the database server's resources. Therefore,

SQL Server multi-Table query optimization solution highlights, sqlserver The multi-Table query optimization solution of SQL Server is what we will introduce in this article. We provide the optimization solution and specific optimi

sp_executesql. The sp_executesql batch cannot reference a variable declared in a batch that calls sp_executesql. sp_executesql a local cursor or variable in a batch is not visible to the batch that calls sp_executesql. Changes made to the database context are only valid until the end of the sp_executesql statement.If you change only the parameter values in the statement, sp_executesql can be used instead of the stored procedure to execute Transact-SQL