dynamic-sql

来源： https://stackoverflow.com/questions/35559093/how-to-use-variable-as-table-name-in-plpgsql

来源： https://stackoverflow.com/questions/63200469/how-to-sort-this-mysql-query

来源： https://stackoverflow.com/questions/63225213/create-dynamic-sql-based-on-column-names-passed-through-a-string

来源： https://stackoverflow.com/questions/63225213/create-dynamic-sql-based-on-column-names-passed-through-a-string

问题 I work on a query for SQL Server 2012. I have an issue: I can't build select Query split Column Temp value to two Column When row in the temp table #nonparametric has the flag Allow = 1, it must split column Temp value from #nonparametric to two column when the flag Allow = 1 . suppose column Temp value has value 50.40 kg it must split to two column First column with number so it will have 50.40 and it will be same Name as Parametric . Second column with Text so it will have kg and it will be

问题 I have some dynamic sql statement which bombs under certain conditions, so I am trying to debug it. it gets built like so: declare @sql varchar(4000); ... select @sql = '<part1>'; ... select @sql = @sql + '<part2>'; ... select @sql = @sql + '<part3>'; ... begin execute(@sql); select @ec__errno = @@error if @ec__errno != 0 begin if @@trancount != 0 begin rollback; end return @ec__errno; end; ... As I said, it bombs in a particular iteration of a loop (don't ask me why it is implemented like

问题 The objective of the code is to run a query dynamically and return 0 if there are no rows with data present in the columns and to return 1 if there are rows with data in the columns. This is my code for the stored procedure: ALTER proc [dbo].[usp_ColumnFieldValidator] ( @TblName nvarchar(30), @ColumnName nvarchar(30), @RetVal bit output ) as begin declare @CountOfRowsQuery as nvarchar(300) set @CountOfRowsQuery = 'select count('+quotename(@ColumnName)+') from '+quotename(@TblName)+' having

问题 The objective of the code is to run a query dynamically and return 0 if there are no rows with data present in the columns and to return 1 if there are rows with data in the columns. This is my code for the stored procedure: ALTER proc [dbo].[usp_ColumnFieldValidator] ( @TblName nvarchar(30), @ColumnName nvarchar(30), @RetVal bit output ) as begin declare @CountOfRowsQuery as nvarchar(300) set @CountOfRowsQuery = 'select count('+quotename(@ColumnName)+') from '+quotename(@TblName)+' having

问题 ALTER PROCEDURE [dbo].[Create_Subjects] @Subj_ID nvarchar(9) AS DECLARE @First3Digits nvarchar(3); DECLARE @Result int; DECLARE @Sql nvarchar(max) -- Fetching the fiest 3 digits of the subject SET @First3Digits = SUBSTRING(@Subj_ID,1,3); -- Check if view is present or not IF EXISTS (SELECT 1 FROM sys.views WHERE Name = @First3Digits) BEGIN SET @Sql = 'select @Result = case when exists (select 1 from dbo.' + quotename(@First3Digits) + ' where SubjectName = ''' + @Subj_ID + ''') then 1 else 0

问题 I need help with a query. In my query I want to pass my table name as parameter. This is my query: SELECT DISTINCT CONVERT (varchar, InspectDateTime) AS 'Inspect Date Time', CONVERT (varchar, SynDateTime) AS 'Sync Date Time', Employee, ROUND(OverAllPercentage, 2) AS Grade FROM Table_Name WHERE (DATEADD(dd, DATEDIFF(dd, 0, InspectDateTime), 0) BETWEEN DATEADD(dd, DATEDIFF(dd, 0, @From ), 0) AND DATEADD(dd, DATEDIFF(dd, 0, @To ), 0)) ORDER BY 'Inspect Date Time' Here I want to pass the Table