--1 rows of records transformed to columns 行转列 if exists(select 1 from tempdb.sys.tables where upper(name) like upper('%tempScores%')) drop table #tempScores create table #tempScores ( studentNamevarchar(200), className varchar(200), classScore int ) insert into #tempScores (studentNa...
SELECT @MyNumber1 = 144, @MyNumber2 = 121 -- Assign the function result to the variable: SELECT @MyResult1 = SQRT(@MyNumber1), @MyResult2 = SQRT(@MyNumber2) -- Return the variable value SELECT @MyResult1, @MyResult2 上面的例子首先声明了4个变量,然后用两个SELECT语句给这些变量赋值,...
'To store all the columns available in the current active sheet DimColNames(100)AsString Col = 1 Row = 1 DimColCountAsInteger ColCount = 0 'Get Columns from the sheet DoUntilActiveSheet.Cells(Row, Col) =""'Loop until you find a blank. ColNames(ColCount) ="["+ ActiveSheet.Cells(Row,...
还可以通过存储过程来查询相关信息,比如EXEC sys.sp_tables; EXEC sys.sp_columns; EXEC sys.sp_help @objname = N'dbo.tableA'等,这种方式不是特别推荐,但sp_help在俺的SQL生涯中确实出现了很多次哦。此外SELECT SERVERPROPERTY('productlevel')可以查询当前数据库实例的版本,这不是重点,想说的是本机的查询...
When adding columns to atable that already has data in it, you will be required to add the column with NULLvalues allowed. You can’t specify that the column be NOT NULL, because you must first add the column to the table before you can put avalue in that column for existing rows. ...
Unique constraints are very similar to primary key constraints. Often, you will have more that one column or set of columns that uniquely determine rows in a table. For example, if you have a surrogate key defined as the primary key, you will most likely also have a natural key whose uni...
问T-SQL过程-过滤器参数作为对象/CLR/Xml/UDTEN一.摘要 表值参数（Table-valued parameters）简称...
PIVOTandUNPIVOTare relational operations used to transform a set by rotating rows into columns and columns into rows. PIVOT ThePIVOToperator consists of several clauses and implied expressions. TheAnchorcolumn is the column that isn’t be pivoted and results in a single ...
'To store all the columns available in the current active sheet 1. Dim ColNames(100) As String 1. Col = 1 1. Row = 1 1. Dim ColCount As Integer 1. ColCount = 0 1. 'Get Columns from the sheet 1. Do Until ActiveSheet.Cells(Row, Col) = "" 'Loop until you find a blank. ...
Basic - select with fixed values - invert columns to rows Basic CTE query, get full path of something recursive BCP Error - Copy direction must be either 'in', 'out' or 'format'. BCP Export to csv using UTF-8 or UTF-16 BCP Issue when using a format file and excluding columns. BCP...