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Questions tagged [outer-join]

An outer join defines a relationship between two tables where all records from one or both tables are returned regardless of the existence of a matching key-field in the other table. A full outer join combines the results of both tables. A left or right join returns all the records from the first or second specified table, respectively. NULLS are filled in for matches on either side. A self-join compares a table to a copy of itself.

A full combines the results of both tables. A left or right returns all the records from the first or second specified table, respectively. NULLS are filled in for matches on either side. A compares a table to a copy of itself.

References

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Using self Joins to expand database table

I have a table in a database with two three columns ID, NAME, SUBJECT, SCORE There are only three possible values for subject math, physics,biology and for each there is a corresponding score in the score field. Because each student can take more…
flexxxit
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MySQL Joins causing duplicates

My understanding of why certain MySQL Joins do what they do is a bit scatterbrained. I have multiple tables, ALM_RECORDS which has ID, and ALM_PHONES, ALM_ADDRESS both which have a column RecordsID that correlates to ALM_RECORDS's ID…
ipixel
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outer join in access

I've 3 tables in total, namely table1, table2 & 3. Data in table2 & 3 are quite huge, so I wanna outer join table2 & 3 based on the keys e.g. member no & id no first before joining table1. SELECT A.field1, A.field2, A.field3,…
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Full Outer Join not working in MySql

I would like to know the alternative for Full Outer Join in MySQL. I know it can be done through union but it's not working because my requirement is little complex I hope so. I have two tables master(branch_id,purchase_mindate,purchase_billvalue)…
Ajeesh
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Returning Unique rows from Left Outer Join

I am trying to build a query which will give me unique rows. Details:- Table 1 (F1, F2 are the columns) F1 F2 1 A1 2 A2 3 A3 4 A4 Table 2 (F3,F4 are the columns) F3 F4 1 B1 1 B11 2 B2 2 B22 My Query (Incorrect) select rrn(A),…
rush2hem
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Outer join trouble

So I wrote a select statement with an outer join and I am having problems with some of the logic. First off here is the statement: SELECT DISTINCT ah.ACCOUNT, lr.recall_status, lr.cancel_recall, lr.suit_atty, lb.note_sent, lb.current_atty, …
user2405778
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can this be written with an outer join

The requirement is to copy rows from Table B into Table A. Only rows with an id that doesn't already exist, need to be copied over: INSERT INTO A(id, x, y) SELECT id, x, y FROM B b WHERE b.id IS NOT IN (SELECT id FROM A WHERE x='t'); …
rouble
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Hot to get unmatched rows in the end of result while doing outer join?

I am trying a left outer join like this SELECT records.some_id FROM forms LEFT OUTER JOIN records ON forms.form_id = records.form_id ORDER BY records.some_id This will give me all the results from table:forms including some where records.form_id…
Mohit Verma
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Informix sql searching of outer join tables

I use the following sql command to search some records. select con.type, con.contract_id, con.account, chk.account, chk.check_flags from contract_scan_image con, outer check_customer_info chk where con.type='AP' and con.account=chk.account and got…
Johnny
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mssql isnull don't work in outer apply

outer apply ( isnull( (select top 1 sea.Daily, sea.SeasonId from Season as sea where sea.propertyId = prop.PropertyId and FromDate < @FromDate and ToDate > @ToDate ), (select top 1…
Tatti
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inserting rows from one table to another, which sql is more efficient (outer join vs sequential scan)

I need to copy over rows from Table B to Table A. The requirement is to only insert rows that are not already in A. My question is, which is of the the following two is more efficient: A) INSERT INTO A (x, y, z) SELECT x, y, z FROM B b …
rouble
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what is the difference between inner and outer joins sql server

I tried to search in the google. But everyone is explaining about inner join and when comes to outer join they are including full outer join /left/right. I just want to know only the difference between inner join and outer join.
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Mysql simulating FULL OUTER JOIN

I have 2 tables users and orders, I want get users and his orders count SELECT `users`.*, `orders`.*,count(*) FROM `users` LEFT JOIN orders ON `users`.`id` = `orders`.`user_id` UNION SELECT `users`.*, `orders`.*,count(*) FROM users RIGHT JOIN…
Wizard
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MySQL joining multiple column

I have two tables with several columns, and I want to join these tables using an outer join. However, it takes forever. I just think I made a mistake or maybe there are other solutions? create table table_1 ( sn int(11) unsigned NOT NULL…
korn3lius
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Using Complex Join

I need to fetch a list of Participants for an event. An event can be tagged for some countries and regions. A Participant can register with their interest area (Countries and regions). Interest Area(s) are being used as an option for the…
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