Microsoft SQL Server 使用保留的關鍵字來定義、操作和存取資料庫。 保留關鍵字是 Transact-SQL 語言文法的一部分,SQL Server 使用這些關鍵字來剖析及理解 Transact-SQL 陳述式和批次。 雖然在語意上可以利用 SQL Server 保留關鍵字作為 Transact-SQL 指令碼中的識別碼及物件名稱,但您必須分隔這些識...
SUBSTRING ( expression, start, length ) Nota Per visualizzare la sintassi Transact-SQL per SQL Server 2014 (12.x) e versioni precedenti, vedere la documentazione delle versioni precedenti.Argomentiexpression È un'espressione di tipo character, binary, text, ntext, o image.start...
There are two types of binary collations in SQL Server:The legacy BIN collations, which performed an incomplete code-point-to-code-point comparison for Unicode data. Legacy binary collations compared the first character as WCHAR, followed by a byte-by-byte comparison. In a BIN coll...
Microsoft SQL Server 将保留关键字用于定义、操作和访问数据库。保留关键字是 SQL Server 使用的 Transact-SQL 语言语法的一部分,用于分析和理解 Transact-SQL 语句和批处理。尽管在 Transact-SQL 脚本中使用 SQL Server 保留关键字作为标识符和对象名在语法上是可行的,但规定只能使用分隔标识符。
SQL Server Yukon Beta 1 introduces the new TRY/CATCH construct for error handling in T-SQL. This construct allows you to trap transaction abort errors, even those that would have caused a batch to terminate in previous versions of SQL Server (conversion errors, deadlocks, and so on). The ...
"EXECUTE AT" with Dynamic Linked Server Name "explicit value must be specified for identity column in table" error in SQL 2000 "FROM clause have the same exposed names. Use correlation names to distinguish them" "No transaction is active." error when trying to send a transactional SQL statmen...
Transfer data to SQL Server. Use one of several tools for importing data into SQL Server. Remove the old database after testing the new SQL Server installation. You may want to keep a copy or a backup for future reference. Specific information is included for migrating to SQL Server from...
Server Developers face is the need to extract a portion of a string from a larger text field to display the information in a more concise format or perform calculations/analysis on a specific substring of the data. How do you extract only a specific portion of the string in SQL Server?
start– specifies the starting point of the first character you want to return. SQL Server starts counting at 1. So SUBSTRING('MSSQLTips',3,3) returns 'SQL', SUBSTRING('MSSQLTips',6,3) returns 'Tip'. If you have a length below 1, SQL Server will count back although it will not ...
cmdlets specific to using PowerShell with SQL Server, and adds a PowerShell drive (PSDrive) allowing us to navigate SQL Server as though it were a filesystem. We’ll explore these features, then look at some scripts we can use to administer SQL Server as well as to extract data as ...