SQL Server ODBC driver for Windows users can now use the Named Pipes connection protocol. This allows you to use the driver in SQL Server deployments where TCP/IP connections have been turned off or to take advantage of performance improvements in environments where Named Pipes is a more efficie...
To better understand and work with GUIDs, you can create SQL functions that decompose GUIDs into their components and show their ordering. To understand how the GUID is decomposed I would like to share this function. CREATEFUNCTIONdbo.DescomponerGUIDString(@guidUNIQUEIDENTIFIER...
SQL Server Compact 4.0 supports ASP.NET without the need for any specific configuration. The flag SQLServerCompactEditionUnderWebHosting is no more required in SQL Server Compact 4.0 and is removed. Virtual Memory Reduction The usage of virtual memory for each connection of SQL Server Compact has ...
drop table if exists flgp; create table flgp ( type int, name nvarchar(200), index ncci nonclustered columnstore (type), index ix_type(type) ); This table has two columns, one classic B-tree index, and one COLUMNSTORE index. B-tree index is better for the queries that need a limi...
DECLARE @pic NVARCHAR(64) DECLARE My_Cursor CURSOR --定义游标 FOR (SELECT jid FROM journal WHERE isall in(1,2)) --查出需要的集合放到游标中 OPEN My_Cursor; --打开游标 FETCH NEXT FROM My_Cursor INTO @jid; --读取第一行数据 WHILE @@FETCH_STATUS = 0 ...
@QRY nvarchar(MAX) , @val int; BEGIN SET @QRY='select @val = count(*) from production.product'; EXEC sp_executesql @QRY, N'@val int OUTPUT', @val = @val OUTPUT; PRINT @val; END; Of course, there is no need for dynamic SQL at all unless the query string varies by execution...
A Unique Constraint will not allow a duplicate value in a column. We will an additional field called EmpNum, which is used as a unique identifier. CREATE TABLE [dbo].[Employees_5]( [EmpNum] [int] NOT NULL UNIQUE, [FirstName] [nvarchar](40) NULL, ...
Is one better than the other? Aging Report SQL Query Alias all columns in a given table Alias column with variable value in SQL Script All MonthNames and Month numbers in sql server All queries combined using a UNION, INTERSECT or EXCEPT operator must have an equal number of expressions in...
SQL Server’s NCHAR/NVARCHAR can store the Unicode characters in the code point range only*from 0 to 65,535. This is also known as BMP – Basic Multilingual Plane. Every character in this range requires 2 bytes of storage space, hence i.e NCHAR(1) requires 2 bytes. The characters above...
While there is no dedicated SQL Server JSON data type, JSON text is stored in varchar or nvarchar columns and is indexed as plain text. 6. Binary Strings Binary string data types are used to store binary data, such as image, audio, and video files of fixed or variable length, in a ...