最大長と最大長を持つすべての SQL 列を一覧表示する

提案をありがとう。私は次の解決策を思いつきました。必要なデータが得られますが、より効率的にできるかどうかを知りたいです。

declare @results table(ID varchar(36),TableName varchar(250),ColumnName varchar(250),DataType varchar(250),MaxLength varchar(250),Longest varchar(250),SQLText varchar( 250))INSERT INTO @results(ID,TableName,ColumnName,DataType,MaxLength,Longest,SQLText)SELECT NEWID(), Object_Name(c.object_id), c.name, t.Name, case when t.Name !=' varchar' Then 'NA' when c.max_length =-1 then 'Max' else CAST(c.max_length as varchar) end, 'NA', 'SELECT Max(Len(' + c.name + ')) FROM ' + OBJECT_SCHEMA_NAME(c.object_id) + '.' + Object_Name(c.object_id)FROM sys.columns cINNER JOIN sys.types t ON c.system_type_id =t.system_type_idWHERE c.object_id =OBJECT_ID('MyTable') DECLARE @id varchar(36)DECLARE @sql varchar(200)declare @receiver table(theCount int)DECLARE length_cursor CURSOR FOR SELECT ID, SQLText FROM @results WHERE MaxLength !='NA'OPEN length_cursorFETCH NEXT FROM length_cursorINTO @id, @sqlWHILE @@FETCH_STATUS =0BEGIN INSERT INTO @receiver (theCount) exec(@ sql) UPDATE @results SET Longest =(SELECT theCount FROM @receiver) WHERE ID =@id DELETE FROM @receiver FETCH NEXT FROM length_cursor INTO @id, @sqlENDCLOSE length_cursorDEALLOCATE length_cursorSELECT TableName, ColumnName, DataType, MaxLength, Longest FROM @results