nvarchar属于Unicode字符类型 nvarchar每个字符都占2个字节 nvarchar最大可存储4000个Unicode字符 所以：declare @str nvarchar(max)这个变量最大可以存储4000个双字节字符
SQL USEAdventureWorks2022; GOSETNOCOUNTON; GODECLARE@Groupnvarchar(50), @Sales MONEY;SET@Group= N'North America';SET@Sales =2000000;SETNOCOUNTOFF;SELECTFirstName, LastName, SalesYTDFROMSales.vSalesPersonWHERETerritoryGroup = @GroupandSalesYTD >= @Sales; ...
SQL DECLAREvend_cursorCURSORFORSELECT*FROMPurchasing.VendorOPENvend_cursorFETCHNEXTFROMvend_cursor; B. 使用巢狀數據指標來產生報表輸出 下列範例顯示如何讓資料指標形成巢狀結構,以產生複雜報告。 內部資料指標宣告給每個供應商。 SQL SETNOCOUNTON;DECLARE@vendor_idINT, @vendor_nameNVARCHAR(50), @messageVARCHAR...
Declare @username nvarchar(100) CREATE USER 浏览2提问于2019-02-05得票数 0 回答已采纳 1回答 在SQL Server中使用局部变量和" Use“语句 、 我想在SQL Server中将局部变量与use语句一起使用。我找过了,但找不到合适的解决方案。declare @var varchar(100) use @var 浏览2提问于2016-07-15得票数 0 回...
CONVERT FLOAT TO NVARCHAR Convert from boolean to bit Convert from Decimal to Hex in SQL convert from scientific notation convert from uniqueidentifier to int? Convert GUID to bytearray in SQL convert hh:mm to total decimal hours convert hh:mm:ss to seconds Convert int to varchar(max) Convert...
而Redis另辟蹊径，结合其有序队列zset以及geohash编码，实现了空间搜索功能，且拥有极高的运行效率。
DECLARE @Persons NVARCHAR(4000) = 'Miller,Margheim,Galvin,Duffy,Khanna'; SELECT PersonType, FirstName, MiddleName, LastName FROM PErson.Person WHERE LastName IN ( SELECT value FROM string_split(@Persons,',') ); If you are working on a newer version of SQL Server, using the list of val...
Looking at the code , it's a little difficult to know where to start. The number of NVARCHAR(MAX) parameters looks like an attempt to create a piece of code that tries to deal with any kind of enquiry - it's probably better to create a procedure for each parameter and call the proce...
There is no need to concatenate the variables into your code. That is SQL Injection at it's finest. Use the variables as parameters. Also, it appears that you are trying to get disk space for your linked servers. If you created a linked server for this reason, then that's probably not...
INSERT INTO [SA0067].[UNPIVOT]([RECORD_ID],[METRIC_NAME],[NAME],[COLUMN_Name],[COLUMN_VALUE])VALUES(7,'REC','SG','ID',33);--- DYNAMIC SQL thats needs to be re-writtenDECLARE @COLUMNNAMES NVARCHAR(MAX)='' DECLARE @SQL NVARCHAR(MAX)='' ...