ansi nulls

  Null: Unknown data   Null: any operation that has null is null, except the following: When set ansi_null of: null = NULL, the result is true. Set concat_null_yields_null off: NULL is treated as a null string (however, if all the

(i)SET Ansi_nulls {on | OFF}Specifies the SQL-92 compliance behavior of these operators when using the Equals (=) and not equal (<>) comparison operators on null values.NotesThe SQL-92 standard requires a value of equal to (=) or Not equal to (<>)

--Connect remote SQL or insert data with OPENROWSET--if only temporary access, you can directly use OPENROWSET--Query ExampleSelect * from OpenRowset('SQLOLEDB','SQL Server name';'User name';'Password', database name. dbo. Table name)--Import

From:https://www.cnblogs.com/railgunman/archive/2010/12/25/1916780.htmlConnect remote SQL or insert data with OPENROWSET--if it's just temporary access, you can use OPENROWSET directly--query ExampleSELECT * FROM OPENROWSET (' SQLOLEDB ', ' SQL

SQL Server connections across serversConnect remote SQL or insert data with OPENROWSET--if it's just temporary access, you can use OPENROWSET directly--query ExampleSELECT * FROM OPENROWSET (' SQLOLEDB ', ' SQL Server name '; ' User name '; '

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SQL Authoring Specification 1. Basic SQL Authoring Specification (1) Direct use of table names in rule 1:sql, no schema as prefix, and cross schema access to create synonym (Data Warehouse, CRM database not applicable). (2) Rule 2: You must use

StatusBITs, some of which can be set by using alter DatabaseAs noted: 1 =Autoclose(Alter database) 4 =Select into/bulkcopy(Alter database using set recovery) 8 =Trunc. Log On chkpt(Alter database using set recovery) 16 =Torn page Detection(Alter

The data does not say whether you are working on programming or are not going to learn SQL, but virtually every developer will eventually encounter it. You probably don't have to be responsible for creating and maintaining a database, but you should

Transferred from: Http://blog.163.com/[email protected]/blog/static/285720652010950921286/7. Data typeIn database theory, the two parts of relational model and data type are orthogonal (see the 8th section of "The path of Programmer's cultivation"