This article describes in detail the performance and space occupied by varchar (n) and nvarchar (n) in SQL. For more information, see.
This article describes in detail the performance and space occupied by varchar (n) and nvarchar (n) in SQL. For
Ext.: http://blog.csdn.net/jackychu/article/details/4183118Http://www.cnblogs.com/jhxk/articles/1633578.htmlMany developers in the database design often do not have much to consider char, varchar type, some do not pay attention to, because the
The NVARCHAR class stores one character in two bytes. You only need to change NVARCHAR to VARCHAR.
In Microsoft SQL Server, Unicode data is supported for the following data types:
Nchar
Nvarchar
Ntext
Note that the prefix n for these data types
Suppose there are stored procedures: proc_test2Create proc Proc_test2@Id intBeginAsDECLARE @sql varchar (max)@sql = ' SELECT * from test2 where 1=1 'If @Id <> 0Set @sql + = ' and Id = ' +@IdEXEC (@sql)EndThe parameters required by the stored
ntextThe maximum length of a variable-length Unicode data is 230-1 (1,073,741,823) characters. The storage size is twice times the number of characters entered (in bytes). The synonym of ntext in SQL-92 is national text.ntext The data is stored in
Recently done Oracle and SQL Server database compatibility, feel that SQL Server really does not use Oracle, stored procedures can only return int type, crazy crazyThe difference between output and return of a stored procedureSQL Rounding Ceiling
If you use 2 to query a comma-delimited field with this ID data, you can use the database built-in function charindex to query the select * from the Users where CHARINDEX (', ' + ' 2 ' + ', ', ', ' +roleid+ ', ' >0 column is the loop to get the data
After so many years of mixing in the forum, we have seen an obvious trend: more and more netizens are using VFP and SQL server for the system. Many people are concerned about how to operate or manage SQL Server from VFP. You can use views, SPT, or
converting data to occurMsg 8115, Level 16, State 6, line 1thAn arithmetic overflow error occurred while converting nvarchar to data type numeric.Nvarchar is with a long decimal, directly converted to decimal failedSolution:Convert to float and
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