sql where multiple conditions

SQL Server creates an index on a view the criteria for creating an index on a view requires three conditions: first, the view must be bound to the schema. To do this, you must add the with SCHEMABINDING in the CREATE VIEW statement, and if you are using Enterprise Manager, right-click on the space in the design interface and select bind to schema. Index must be a unique index. www.2cto.com To do this, you

) EXEC (@strSQL) Tested the above two stored procedures, test environment: Core 2 Duo 2.20gh,1g memory, SQL SERVER2008 Paging query test for 500,000 data Query conditions are: XName like '%222name% ' "Page1:2 sec 937 milliseconds": Indicates when the first page is used, and so on Do not use Row_number () to count every page: Page1:2 seconds 937 milliseconds Page2:3 seconds 140 milliseconds Page3:3 seco

Creating an index on a view requires three conditions:1. The view must be bound to the architecture.To do this, you must add with schemabinding to the create view statement. If you are using the Enterprise Manager, right-click the blank area in the design field and select "bind to architecture" for properties ".2. The index must be a unique index.To do this, you must specify unique in create index.3. The index must be a clustered index.To do this, you

BKJIA exclusive Article] low carbon index: here we use Intel Xeon X7500 processor TDP as the standard for computing power consumption TDP = 130 W/h = 2.167 W/m = 0.036 W/s) to facilitate computing and visualization ). In addition, according to data from the China Forestry Administration, a tree absorbs 5.023 kg of carbon dioxide a day and generates 0.785 kg of carbon dioxide per power. If the execution time of the database is reduced from 27 seconds to 14 seconds after optimization, that is, the

Original address: Http://msdn.microsoft.com/zh-cn/dd567295.aspxIn the data query, often encountered the need to dynamically build query conditions. Using LINQ to implement this requirement may be more cumbersome than stitching up SQL statements in the past. This article describes 3 ways to dynamically build query conditions at run time. The examples in this artic

In SQL statements, when the number of conditions is very large, what better way to replace the where...in conditional clauses? When the Where condition in the SQL statement is where ID in (1,2,3,4,8,11,23,56,89,110,...), that is, when the number of in is quite large, the SQL statement is very poor, so what other better

Label:In the data query, often encountered the need to dynamically build query conditions. Using LINQ to implement this requirement may be more cumbersome than stitching up SQL statements in the past. This article describes 3 ways to dynamically build query conditions at run time.The examples in this article all end up with the same functionality, searching from

Tom continues to seek help .. In PHP, how does one use arrays as conditions for SQL query statements. Thank you for your great help in your previous post and finally figured out what was going on. Now I encountered another problem: I asked the user to submit 12 multi-choice lists on one page, and obtained 12 Arrays. then I searched the database based on the contents of these 12 groups, however, it seems tha

1. Test Table Employee Employee ID department ID salary Emp_id dept_id salary 01 01 1050 02 01 2000 OK. Search for employees with salaries higher than 1000 under Department 01. 2. principles and comparison of the two SQL statements principle, most databases use left-to-right sequence processing conditions, put the conditions that can filter more data on

Conditions | Statements sometimes taking out all of the database records may just meet your requirements, but in most cases we usually only need to get a partial record. So how do you design the query? Of course it will be a bit more brain, and this article also deliberately do not want to let you use that what them recordset. For example, if you're only going to take out P_name records and the names of those records must start with the letter W, y

Frequently written SQL statement conditions will have two single quotes, but they are enclosed in quotation marks,such as SELECT * from Control where column= " if the condition in column is exec usp_data ' {0} 'That's a bad thing to do, just take it in. The SQL statement reports a syntax error.The solution is to represent a single quotation mark with two single

statement in the exported file to specify the Binlog location of the current backup, which can be done if you want to restore the file to slave. 1.2 RestoreThe file backed up with Mysqldump is a SQL script that can be poured directly into it, and there are two ways to import the data.Directly with the MySQL clientFor example:/usr/local/mysql/bin/mysql-uyejr-pyejr Db_name Use SOURCE syntax (experiment not successful!!!) ）In fact, this is not the stand

Original address: http://www.cnblogs.com/dwfbenben/p/3307941.htmlWhen we use an expression as a column of output, we cannot use that column directly in the Where condition as a criterion. For example, the following SQL statement:select id (C1 + C2 ) as s from t1 where s > 100 nbsp SQL Server Error: Select Id (C1 + c2) as s from t1 where (C1 + c2) > The is no problem. But when the expressi

Label:When querying database records using SQL statements, there are many different ways to query the same content. Still, although you can get the same results using a variety of methods, if you use a different approach, the execution benefits are quite different. Therefore, we have to consider carefully, if you want to query the same results, which statement to use, the implementation of the benefit is better. This is the optimization of the

Label: -- ============================================= --author:james Fu --Create Date:2015/10/27 --description:v0.1 to delete qualifying data in a batch manner -- ============================================= CREATE PROCEDURE [dbo].[Sp_largedelete] @TableNamesysname,@MaxRows int = 100000, @Filter nvarchar( +)= "' as BEGIN SETNOCOUNT on; DECLARE @SQL nvarchar( +) BEGINTRYIF(@Filter = "' OR @Filter is NULL ) BEGIN

1. Single Condition queryvar expr = context. "LINQ to SQL");SELECT [Extent1].[ProductID] as [ProductID], [Extent1].[CategoryID] as [CategoryID], [Extent1].[ProductName] as [ProductName], [Extent1].[UnitPrice] as [UnitPrice], [Extent1].[discontinued] as [discontinued] from [dbo].[Product] as [Extent1] WHEREN'LINQ to SQL' = [Extent1].[ProductName]2. Combination criteria Que

In the data query, we often encounter the need to dynamically build query conditions. Implementing this requirement with LINQ can be a bit more cumbersome than the previous concatenation of SQL statements. This paper introduces 3 kinds of methods of dynamically constructing query conditions in runtime. The example in this article ultimately implements the same fu

When learning a database, you will often encounter on and where today to talk about the difference between on and where. When a database returns records by connecting two or more tables, an intermediate temporary table is generated, and the temporary table is returned to the user. When using a left join, the on and where conditions differ as follows: 1. On condition is the condition used when generating a temporary table, which returns records from t

to using Columnstore indexes in 2012 and many problems, and problems such as those on SQL Server 2014+ have been greatly improved, so it is not recommended to use Columnstore indexes in SQL Server 2012, which can be used on SQL Server 2014+.When we create an index in SQL Server 2012, we are prompted to have COLUMNSTOR

This article from: http://user.qzone.qq.com/651297539? Ptlang = 2052 #! APP = 2 amp; Pos = 1337080083 When using SQL statements to query database records, you can query the same content in different ways. Although multiple methods can achieve the same results, the implementation benefits are quite different.This is the optimization of SQL statements.The followin