2023年8月15日 · select distinct a.FirstName, a.LastName, v.District from AddTbl a inner join ValTbl v on a.LastName = v.LastName order by a.FirstName; Or this (it does the same, but the syntax is different): select distinct a.FirstName, a.LastName, v.District from AddTbl a, ValTbl v where a.LastName = v.LastName order by a.FirstName;

2015年10月15日 · I did a test on MS SQL 2005 using the following tables: A 400K rows, B 26K rows and C 450 rows. The estimated query plan indicated that the basic inner join would be 3 times slower than the nested sub-queries, however when actually running the query, the basic inner join was twice as fast as the nested queries, The basic inner join took 297ms on very …

2021年6月22日 · Then using this new column (FirstFourLastName), I wrote code for Inner Join in SQL with an aim to assign the Unique "Client Code" to each record in table FMAY. I am able to get the correct client code assigned but not able to ONLY select distinct records. My code is:

So I need a query which INNER JOINs the two tables. The query below is pulling every result from the ARCHIVESCATALOGUE table, i.e. multiple results per artist. But I only need one result per artist. I used DISTINCT on the artist.ArtistID field, but to no avail. Here is the code:

2009年12月22日 · You need to include the restriction on person id in your join and use an outer join. Outer joins are used when you want to return information even if there are no records in the table you're joining to. Try. SELECT person_id, vehicles.* FROM vehicles LEFT OUTER JOIN Owners on vehicles.vehicle_id = owners.vehicle_id and person_id = 1

2013年4月10日 · select distinct Table1.Id as Id, Table1.Name, Table2.Description from Table1 left outer join Table1Table2Map on (Table1Table2Map.Table1Id = Table1.Id) left outer join Table2 on (Table2.Id = Table1Table2Map.Table2Id) For simplicity I have excluded the where clause.

2012年3月6日 · I am trying to get the DISTINCT value of one column in a table. This column however is INNER JOINED from another table through an id. When I try to use the DISTINCT on the column, it produces the same results because …

2012年2月28日 · If you need a simple distinct list from the uploads table then you can do it like this: SELECT collections.title, collections.uniqueID, uploads.uniqueID as thumb FROM collections INNER JOIN (SELECT DISTINCT uniqueID FROM uploads) uploads ON collections.uniqueID = uploads.uploadGroup WHERE collections.owner = @owner

2011年7月15日 · SELECT person.person_name, cars.person_id FROM cars INNER JOIN person ON person.person_id=cars.person_id But I don't want duplicates, so I need to incorporate it using something like this: SELECT DISTINCT person_id FROM cars

2009年6月24日 · I am trying to Join Multiple Tables. Table 1 has distinct ID's Table 2 has multiple names for each ID SAY 3 NAMES Table 3 has 2 dates for each ID when i join the Three tables, I get 6 rows of data...