sql server fuzzy string comparison

comparison for multiple times, and the time complexity is a level higher. For example, the response time of this method is closely related to the obtained page number.The second method is acceptable. It has nothing to do with the page number, but it also needs to be compared twice. The comparison ID method is available on the Internet, but not all tables have IDs. Even if there are IDs, they are not nece

Most of the data that server SQL Server transmits on port 1433 is plaintext, including IP addresses, connection user names, successes, and failure messages This makes it easy to sniff through the information about SQL Server in this network segment, after getting the userna

compared as an integer value in the order listed. If all of these conditions are equal, the actual string values are compared by collation. For example:BeginDeclare@v1 sql_variant = cast (' 15.00 ' as float (53)),@v2 sql_variant = cast (' 15.00 ' as Decimal (18,4)),@v3 sql_variant = cast (' As-tinyint '),@v4 sql_variant = cast (' 00:00:15.00 ' as time)SelectCase when @v1 > @v2Then ' v1 > V2 'When @v2 > @v1Then ' v2 > V1 'Else ' v2 = V1 '--EndCa

The ORACLE tutorial is: Comparison between Oracle and SQL Server in enterprise applications. My company not only owns Oracle databases but also SQL Server databases, so I often encounter two problems that people ask me.The first is usually "can you teach me how to use Oracle

The paging of the SQL Server Stored Procedure has been discussed for several years. Many friends are asking me, so I would like to express my point of view here.Create a table: Create Table [testtable] ([ID] [int] identity (1, 1) not null,[Firstname] [nvarchar] (100) Collate chinese_prc_ci_as null,[Lastname] [nvarchar] (100) Collate chinese_prc_ci_as null,[Country] [nvarchar] (50) Collate chinese_prc_ci_a

. Calculate the maximum value of the SetS: select max (value) value from(Select 1 valueUnionSelect-2 valueUnionSelect 4 valueUnionSelect 3 value)O: select greatest (1,-2, 4, 3) value from dual19. Minimum value of the SetS: select min (value) value from(Select 1 valueUnionSelect-2 valueUnionSelect 4 valueUnionSelect 3 value)O: select least (1,-2, 4, 3) value from dual20. How to Handle null values (replace null with 10 in F2)S: select F1, IsNull (F2, 10) value from TblO: select F1, nvl (F2, 10) va

two reasons for using named pipelines:Increase speedAssuming that the domain name is also in the LAN, the use of the named pipe protocol is faster than the TCP/IP protocol.Increase securityBecause the named pipe can only be used for LAN, if the server disables the TCP/IP protocol and only enables the named pipe, some security risks can be avoided. 3. How to use a named pipe?Connect to the SQL

This series of articlesContinuous integration of database development-SQL Server deployment and upgrade ToolContinuous integration of database development-SQL Server database structure comparisonContinuous integration of database development-Methods and ProceduresContinuous integration of database development-Liquibase

server| Comparison | problem /*------------------------------------------------------------------------------------ /* Welcome to reprint, please retain this declaration information /* Author: Ongyan enhydraboy@yahoo.com.cn /*------------------------------------------------------------------------------------ This is a problem that I have encountered in my actual project. The results of 03bhl01001 (Shan

grant the table creation permission to the user girl under database mydb. note that users in different databases are different. assume that there is a user named girl under mydb. there is a user under testdb called girl. they all correspond to login boy. granting permissions to user girls under different databases does not affect other user girls. So first log on to the database mydb. Then grant create table to girl; -- OK, and grant the user girl the permission.

When we build a database and want to aggregate the different types of databases scattered across the database in this new database, especially when it comes to data validation, decontamination, and transformation, there are big challenges. Fortunately, SQL Server provides us with powerful, rich data import and export capabilities, and when importing exports, we can flexibly handle the data. There are three

Previously wrote a SQL SERVER 2008 database version of the feature comparison, the official website provides that the function is very good and powerful, later found that the link is invalid. Today again encountered to compare the SQL Server 2014 database version feature req

minimum time unit is minute. Timestamp: Timestamp, a unique number in the database width.Uniqueidentifier: guid, a globally unique identifier. CHAR: fixed-length non-Unicode bytes data with a maximum length of 8000Varchar: Variable Length non-Unicode bytes data, maximum length: 8000Text: Variable Length non-Unicode bytes data. The maximum length is 2 ^ 31-1 (2g) Nchar: bytes data with a fixed length of Unicode. The maximum length is 8000.Nvarchar: variable-length Unicode bytes. The maximum

('fasdbfasegas', 'fa ', 'my') value from dual 27. Length S: Len, datalength O: Length 28. case-insensitive lower, upper 29. uppercase letters S: No O: Select initcap ('abcd DSAF df') value from dual 30. Left fill space (the first parameter of lpad is space, which is the same as the space function) S: Select space (10) + 'abc' Value O: Select lpad ('abc', 14) value from dual 31. Right fill space (the first parameter of rpad is space, which is the same as the space function) S: Select 'abc' + spa

Most of the data that SQL Server transmits on port 1433 is plaintext, including IP addresses, connection user names, successes, and failure messages This makes it easy to sniff through the information about SQL Server in this network segment, after getting the username and IP, Bad password, in fact,

andselectmax(列)(@pageIndexint, --页索引@pageSizeint--页记录数)asbeginsetnocounton;declare @timediff datetimedeclare @sql nvarchar(500)select@timediff=Getdate()set@sql=‘select top ‘+str(@pageSize)+‘ * From tb_TestTable where(ID>(select max(id) From (select top ‘+str(@pageSize*@pageIndex)+‘ id From tb_TestTable order by ID) as TempTable)) order by ID‘execute(@sql)selectd

In a sense, it can also be said that the comparison of common functions of sqlserver and MySQL. Mathematical functions 1. Absolute ValueS: Select ABS (-1) ValueO: Select ABS (-1) value from dual 2. INTEGER (large)S: Select ceiling (-1.001) ValueO: Select Ceil (-1.001) value from dual 3. Round (small)S: Select floor (-1.001) ValueO: Select floor (-1.001) value from dual 4. Round (truncation)S: Select cast (-1.002 as INT) ValueO: Select trunc (-1.002) v