distinct

问题 I have a table with two rows: IMDB_ID and Actor. I am trying to find the pairs of actors who co-stared in 3 or more movies. The pairs of names should be unique, meaning that ‘actor A, actor B’ and ‘actor B, actor A’ are the same pair, so only one of them should appear. Here's a few lines of the table, but not the whole thing: IMDB_ID ACTOR ---------- ----------- tt0111161 Tim Robbins tt0111161 Morgan Free tt0111161 Bob Gunton tt0111161 William Sad tt0111161 Clancy Brow tt0111161 Gil Bellows

问题 I'm trying to get all distinct values across 2 tables using a union. The idea is to get a count of all unique values in the columnA column without repeats so that I can get a summation of all columns that contain a unique columnA. This is what I tried (sql server express 2008) select count(Distinct ColumnA) from ( select Distinct ColumnA as ColumnA from tableX where x = y union select Distinct ColumnA as ColumnA from tableY where y=z ) 回答1: SELECT COUNT(distinct tmp.ColumnA) FROM ( (SELECT

问题 I would like to select the rows that has the same values across column A and column B. For example if my table is A B 1 2 3 4 1 2 4 5 The output should be A B 1 2 A. Select Distinct A,B from table selects all the values in the table. B. Select Distinct (A,B) from table tells me that Distinct function can take only one value. C. Select A,B from table group by A,B Selects all the values in the table (Similar to A). The question is similar to Selecting Distinct combinations. but the answer

问题 I'm using SQL Server. I have the following table ( MyTable ): ID (int) value (varchar) I have the following query: select distinct value from MyTable And the output is: Value_1 Value_2 Value_3 ... ... ... Value_450 I would like to crate the following table (when value = 'value_1' then 1 else o...): ID | Value_1 | Value_2 | Value_3 | Value_4 | .... | Value_450 1 | 0 | 1 | 0 | 0 | .... | 0 2 | 0 | 0 | 0 | 1 | .... | 0 3 | 1 | 0 | 0 | 0 | .... | 0 4 | 0 | 1 | 0 | 0 | .... | 0 5 | 0 | 0 | 0 | 0 |

问题 I want to count the distinct values in a column of a datatable. I found this useful technique: count = dataTable.DefaultView.ToTable(true, "employeeid").rows.count This works fine if there are no nulls in the column, but if there are, the count is high by one. Is there a way to eliminate null valued rows from the count, or do I have to loop through the resulting table looking for a possible null? tbl = dataTable.DefaultView.ToTable(true,"employeeid") For Each row in tbl.rows ... 回答1: You may

问题 Am using Oracle 12c, below is the column: CENTER_ID UNIT EMPLOYEEID LESSON MINS_STUDIED SECTION I234 4 G01234 4.1 5 EX I234 4 G01234 4.1 5 LN I234 4 G01234 4.1 5 VO I234 4 G0123 4.2 5 EX I234 4 G0123 4.2 5 LN I234 4 G0123 4.2 5 VO I2345 5 G023 5.2 12 EX I2345 5 G023 5.2 12 LN I2345 5 G023 5.2 12 VO From record 1 to 6, it contains 2 distinct employee_id who studied unit 4. In this case, I need total minutes spent per unit (center_id wise). But I want to add only distinct MINS_STUDIED based on

问题 I have complicated query which works pretty good (MS SQL 2012). But it makes a mistake when sum up same price items. It count them correctly but only takes price once instead of taking them as a count number. It only appears when same item has same price and from same country. Here is my query ; CREATE TABLE #ITEMS(ID INT,NAME VARCHAR(30)) INSERT INTO #ITEMS SELECT 1, 'laptop' UNION ALL SELECT 2, 'phone' UNION ALL SELECT 3, 'playstation' UNION ALL SELECT 4, 'MacBook' CREATE TABLE #Country(ID

问题 is there a quick and easy way to select all distinct values within a given selection in Excel with VBA? 0 | we | 0 --+----+-- we| 0 | 1 -> the result should be {0,we,1} Many thanks in advance 回答1: Give this a try: Sub Distinct() Dim c As Collection Set c = New Collection Dim r As Range Dim dis As Range Set dis = Nothing For Each r In Selection If r.Value <> "" Then On Error Resume Next c.Add r.Value, CStr(r.Value) If Err.Number = 0 Then If dis Is Nothing Then Set dis = r Else Set dis = Union

问题 Is it possible to create a custom list view (Not a list view webpart) with unique column value. I have one list which has 5 column like project ID, Project Name, Activity ID, Status, Points. I want to create a Custom list view where the Activity ID column should be return distinct value only. How Can I achieve this goal? Please help to do this. All suggestions and answers will be appreciated. Thanks in advance.. 回答1: SharePoint List views are based on CAML queries and CAML does not support

问题 I'm trying to build up a query that would count and distinct at the same time. This is the raw data Raw Data +--------+---------+ | IntID | ErrorID | +--------+---------+ | ins001 | 1 | | ins001 | 1 | | ins001 | 2 | | ins002 | 3 | | ins002 | 5 | | ins002 | 5 | | ins003 | 4 | | ins003 | 1 | | ins003 | 1 | +--------+---------+ What im trying to accomplish is a count for each error id for each distinct instrument id, as shown below: What is expected +--------+-------------+-------------+--------