SQL Server follows the ANSI/ISO SQL-92 specification (Section 8.2,, General rules #3) on how to compare strings with spaces. The ANSI standard requires padding for the character strings used in comparisons so that their lengths match before comparing them. The padding directly affects the semant...
如上测试,SQL Server跟Oracle不一样,在SQL Server中,’’跟null是不一样的,空字符串是空字符串,null是null,SQL Server数据库中不会将长度为零的空字符串视为null。但是SQL Server在查询的时候比较空字符串时,长度为零的空字符串与长度为1的字符串,长度为N的字符串,它们似乎是等价的。跟Oracle的行为完全不一...
"String or binary data would be truncated" and field specifications “Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted...
D. String comparison with spaces The following queries illustrate the comparison between strings where one side contains spaces and the other doesn't: SQL CREATETABLE#tmp (c1VARCHAR(10)); GOINSERTINTO#tmpVALUES('abc ');INSERTINTO#tmpVALUES('abc'); GOSELECTDATALENGTH(...
For partial string comparison options, refer to the LIKE operator, or the CONTAINS and CONTAINSTABLE full text predicates. The SQL Server Database Engine follows the ANSI/ISO SQL-92 specification (Section 8.2, Comparison Predicate, General rules #3) on how to compare strings with spaces. The ...
When referencing the Unicode character data types nchar, nvarchar, and ntext, 'expression' should be prefixed with the capital letter 'N'. If 'N' is not specified, SQL Server converts the string to the code page that corresponds to the default collation of the database or column. Any ...
n: String length to pad to. padding_str: String expression to pad with. Can be a constant, column, or function, and any combination of string operators.Default is a space. Related functions rpad Viewlpadquery example ltrim Removes leading spaces from a string. ...
When comparing two strings of unequal length, one of the rules of SQL (the standard, not just SQL Server) is that the shorter string is padded with spaces until it's the same length, and then the comparison is performed. If you want to avoid being surprised, you'll need to add a no...
When referencing the Unicode character data types nchar, nvarchar, and ntext, 'expression' should be prefixed with the capital letter 'N'. If 'N' is not specified, SQL Server converts the string to the code page that corresponds to the default collation of the database or column. Any cha...
SET ANSI_PADDING OFF- trims the trailing blanks in the string values when they are inserted into a column. This is not recommended behavior. Note SET ANSI_PADDING OFF, and theANSI_PADDING OFFdatabase option, are deprecated. In SQL Server 2017 (14.x) and later versions, and Azure SQL Dat...