现在我们来编写 SQL 查询以获取FirstName字段的第一个字符。可以使用LEFT函数来实现。 SELECTLEFT(FirstName,1)ASFirstCharacterFROMEmployees;-- LEFT(FirstName, 1) 返回 FirstName 的第一个字符-- AS FirstCharacter 将返回的结果命名为 FirstCharacter 1. 2. 3. 4. 在这里,LEFT函数的使用说明如下: LEFT(字...
SQLRETURN SQLGetInfo( SQLHDBC ConnectionHandle, SQLUSMALLINT InfoType, SQLPOINTER InfoValuePtr, SQLSMALLINT BufferLength, SQLSMALLINT * StringLengthPtr); 引數ConnectionHandle [輸入] 連線控制代碼。InfoType [輸入]信息類型。InfoValuePtr [輸出]要在其中傳回信息的緩衝區指標。 根據 所要求的 InfoType ...
SQLRETURN SQLGetInfo( SQLHDBC ConnectionHandle, SQLUSMALLINT InfoType, SQLPOINTER InfoValuePtr, SQLSMALLINT BufferLength, SQLSMALLINT * StringLengthPtr); 引數ConnectionHandle [輸入] 連線控制代碼。InfoType [輸入]信息類型。InfoValuePtr [輸出]要在其中傳回信息的緩衝區指標。 根據 所要求的 InfoType ...
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...
table_name can be a maximum of 128 characters, except for local temporary table names (names prefixed with a single number sign (#)) that can't exceed 116 characters. AS FileTable Applies to: SQL Server 2012 (11.x) and later. Creates the new table as a FileTable. You don't ...
Is a string of characters without spaces or punctuation. phrase Is one or more words with spaces between each word. Note Some languages, such as those written in some parts of Asia, can have phrases that consist of one or more words without spaces between them. ...
Error: The variable System::ErrorDescription contains a string that exceeds the maximum allowed length of 4000 characters. Error: unable to retrieve column information from the data source Error:The precision must be between 1 and 38. Errors converting date time formats with SSIS Errors running SQ...
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...
Filter Column enables you to enter a partial value (such as a number or a string; at least two characters for a string), to limit the dialog box display to items containing the partial value, so that you can then select the one item to appear in the grid. For example, entering EMP ...