Label:Today the project manager came running to yell at me and say what I did before I made a lot of interfaces why didn't do it, I directly fire, before obviously not this thing ...But things still have to be solved, but fortunately, two projects are all used SQL Server, you can quickly solve the problem by cross-database view, save a lot of work. How to do it? Let's see below.text :Sometimes we have acces
You can use the "generate SQL script" tool that comes with SQL Server 2000 to generate SQL scripts for creating tables, views, and stored procedures. So can we generate SQL scripts for the data in the table and automatically impor
There are many ways for SQLServer to search for and delete duplicate records in tables. Below I will list several commonly used SQL statements with good performance. If you need them, please refer to them.
There are many ways for SQL Server to find and delete duplicate records in tables. Below I will cite several commonly used
above code, we can see that this table has the characteristics of the general table--there is a primary key, and the primary key is also a clustered index. As mentioned earlier, a partitioned table is a partition condition for a field, so you cannot create a clustered index other than this field. Therefore, to convert a normal
Rename the column name and table name in oracle directly in pl/SQL and then in oem, however, you may not be able to change the lower-case table name to the upper-case table name. At this time, www.2cto.com can be changed using SQL
then we can break down each point of the key.Partitioning is to split a table data into sub-collections, that is, to split a data file into multiple data files, but the storage of these files can rely on a filegroup or multiple filegroups, because more than one filegroup can increase the database access concurrency, but also can be different partitions configured to different disks to improve efficiency , the recommended partition is created with the
for the column PersonID
--nameNamenvarchar( -) not NULL,--Create a column with Unicode non-fixed length (up to 20 Unicode characters stored) name
--AgeAgeint not NULL CONSTRAINTCk_ageCHECK(age>= - andAge -) ,--Create an integer that constrains the check constraint to a column age
--SexGenderbit not NULL CONSTRAINTDf_genderDEFAULT(1) ,--Create a column of type bit with a default value of 1 (True) gender
--Identity Information
[Identity] nchar( -) not NULL CONSTRAINTCk_identityCHE
Only the SQL scripts of the database are exported, but the data in the table is still not exported. Next we will solve this problem for you. If you are interested, refer to the tutorial.
Only the SQL scripts of the database are exported, but the data in the table is still not exported. Next we will solve this problem
Tags: isnull font name ROM null arch weight 2.x arcTable information field information in SQL Server These things are also placed in the system tables, and the following SQL statement is used to query the field information for a table. SelectT1.name Table_name,t2.namecol_name, T3.name+'('+Convert(varchar( $), T2.length
First SQL statementSelect CompanyName GSMC,ZB Zhibiao from Left Join T_companycode on T_GSNDZB.GSBH=T_companycode.companyidQuery Result:A second SQL statementSELECT min(CompanyName) GSMC,cast(round(sum(T_xstj.hsje)/10000,2) asNumeric -,2)) Ndje fromT_xstj Left JoinT_companycode onT_companycode.companyid=T_XSTJ.GSBHwhere DateDiff( YearSjgetdate())=0 Group byGsbhQuery Result:Statements that are merged int
The code is as follows:
EXEC sp_rename ' table name. [Original column name] ', ' new column name ', ' column '
Transact-SQL Reference
sp_rename
Changes the name of a user-created object (such as a table, column, or user-defined data type) in the current database.
Grammar
sp_rename [@objname =] ' object_name ',
[@newname =] ' New_name '
[, [@objtype =] ' object
Usage scenarios:For example, you need to query all student numbers with scores greater than 95, separated by commas into a string, from the Student score table.To prepare the test data:CREATE TABLE score (ID int,score int)INSERT into score values (1,90)INSERT into score values (2,96)INSERT into score values (3,99)It is now necessary to query the result string "2,,3" with a single statement.The SQL
http://msdn.microsoft.com/zh-cn/library/dn144699.aspx IntroductionIn SQL Server, the common table-to-table inner Join,outer Join is executed by the engine based on the selected column, the data is indexed, and the selected data is selectively converted to loop Join,merge Join,hash Join one of the three physical connect
Tags: jquery backup table name mode regular expression ret win regex UIDSELECT * into new table name from XXXX new table name Best added date remind yourself which day to create var code = $ ("#editWin Input[name=code]"). Val ();var re = new RegExp (/^[0-9a-za-z]*$/g);if (!re.test (code)) {Msg.show ("Please input English or digital", 9);return false;The use of re
' andParent_obj=a.ID andNameinch (
SELECTName fromsysindexesWHEREIndidinch(SELECTIndid fromSysindexkeysWHEREId=a.ID andColid=A.colid))) Then '√' Else "' End, type=b.name, number of bytes occupied=a.length, Length= ColumnProperty(A.id,a.name,'PRECISION'), number of decimal digits= IsNull(ColumnProperty(A.id,a.name,' Scale'),0), allow null= Case whenA.isnullable=1 Then '√'Else "' End, the default value= IsNull(E.text,"'), field description= IsNull(g.[value],"')
fromsysc
Post 1:Temporary tables are similar to permanent tables, but temporary tables are stored in tempdb. They are automatically deleted when they are no longer used.Temporary tables can be local or global. They differ in terms of name, visibility, and availability. The name of the local temporary table starts with a single digit (#). They are only visible to the current user connection and are deleted when the user is disconnected from the
Many friends asked SQL server database "generate scripts" and exported only the SQL scripts of the database, while the data in the table is still not exported. It is very simple. Take a look at the Tutorial:
Note: I use SQLServer2008 here. Other versions should be similar.
1. Select the database to be exported-> task
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