SELECTname,SUBSTRING(name,1,1)ASInitial,SUBSTRING(name,3,2)ASThirdAndFourthCharactersFROMsys.databasesWHEREdatabase_id <5; 结果集如下。 name初始ThirdAndFourthCharacters 主mst tempdbtmp 模型mde msdbmdb 以下示例说明如何显示字符串常量abcdef中的第二个、第三个和第四个字符。
SELECTname,SUBSTRING(name,1,1)ASInitial,SUBSTRING(name,3,2)ASThirdAndFourthCharactersFROMsys.databasesWHEREdatabase_id <5; 结果集如下。 name初始ThirdAndFourthCharacters 主mst tempdbtmp 模型mde msdbmdb 以下示例说明如何显示字符串常量abcdef中的第二个、第三个和第四个字符。
In a BIN collation, only the first character is sorted according to the code point, and remaining characters are sorted according to their byte values. The newer BIN2 collations, which implement a pure code-point comparison. In a BIN2 collation, all characters are sorted according to their ...
You don't have to specify the EXECUTE keyword when you execute stored procedures when the statement is the first one in a batch.SQL Server system stored procedures start with the characters sp_. They are physically stored in the Resource Database, but logically appear in the sys schema of ...
When you bulk transfer data between instances of Microsoft SQL Server and the data file contains Unicode character data but not any extended or DBCS characters, use the Unicode character format. For more information, see Use unicode character format to import or export data (SQL Server). Consider...
ASCII values for extended characters Assign empty string '' if datetime is null Assign EXEC output to Variable Assigning NULL value to column name using Case Statement of where is SQL SERVER 2008 atomic if not exists() and insert or update Attempt to fetch logical page (1:155534) in databas...
如果StringLengthPtr 指向的位置中的值大于 BufferLength 中指定的长度,则字符串输出信息将被截断为 BufferLength 字节,函数返回 SQL_SUCCESS_WITH_INFO。 用法 请参SQLGetInfo( 返回的信息, InfoType可能值列表,以及 SQLGetInfo() 函数针对该值返回的信息描述。 返回码 SQL_SUCCESS SQL_SUCCESS_WITH_INFO SQL_ERRO...
SQL_CATALOG_NAME (string) A character string of "Y" indicates that the server supports catalog names. "N" indicates that catalog names are not supported. SQL_CATALOG_NAME_SEPARATOR (string) The characters that are used as a separator between a catalog name and the qualified name element that...
使用 CONCAT 函数：CONCAT 函数可以将多个字段拼接在一起。例如，将 FirstName、MiddleName 和 LastName...
SQL*Loader-00211: Field name stringstringstring in the FIELD NAMES record in the data file is too long.\n Cause: The field name exceeded the maximum of 30 characters. Action: Specify at most 30 characters. SQL*Loader-00212: The field level ENCLOSED BY clause is not allowed with the...