Left Outer join

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Crystal Reports Online Help
Left Outer join
The result set from a Left Outer join includes all the records in which the linked field value in both tables is an exact match. It also includes a row for every record in the primary (left) table for which the linked field value has no match in the lookup table. For instance, you can use a Left Outer join to view all customers and the orders they have placed, but you also get a row for every customer who has not placed any orders. These customers appear at the end of the list with blanks in the fields that would otherwise hold order information:
Customer Table Customer Table Orders Table
Customer ID Customer Name Order Amount
52 Allez Distribution 25141.50
53 BG Mountain Inc. 19164.30
53 BG Mountain Inc. 1683.60
57 Hansen MTB Inc. 15716.40
58 La Bomba de Bicicleta 1956.20
60 Mountain Toad 24580.50
62 SFB Inc. 7911.80
63 Sierra Bicycle Group 19766.20
63 Sierra Bicycle Group 12763.95
64 Sierra Mountain 8233.50
54 Bicicletas Aztecas
55 Deely MTB Inc.

Note: Left Outer and Right Outer joins are handled differently in the SQL language from other join types. If the database is accessed through ODBC, Crystal Reports uses ODBC syntax in the SQL statement. If you are connecting to an SQL database directly (not through ODBC), Crystal Reports uses a syntax native to the database. For more information about what an Outer join looks like in an SQL statement, refer to Microsoft ODBC documentation or to the documentation for your SQL database.
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Rapporti Crystal Online Għajnuna
Xellug barra jissieħbu
Ir-riżultat sett minn barra Xellug jissieħbu jinkludi l-registri li fihom il-valur qasam marbut fiż-żewġ tabelli hija qbil eżatt. Tinkludi wkoll ringiela għal kull rekord fit-tabella primarja (xellug) li għalih il-valur qasam marbut m’għandha l-ebda taqbila fid-tabella Lookup. Per eżempju, inti tista ‘tuża’ barra Xellug jissieħbu biex tara klijenti kollha u l-ordnijiet li jkunu qiegħdu, imma int wkoll tikseb ringiela għal kull klijent li ma jkunx imqiegħda xi ordnijiet. Dawn il-klijenti tidher fl-aħħar tal-lista bi spazji vojta fl-oqsma li altrimenti jkollhom tagħrif ordni:
Klijent Tabella Klijent Ordnijiet Tabella Tabella
Klijent ID Klijent Isem Ordni Ammont
52 Allez Distribuzzjoni 25,141.50
53 BG Muntanji Inc 19,164.30
53 BG Muntanji Inc 1,683.60
57. Hansen MTB Inc 15,716.40
58. La Bomba de Bicicleta 1,956.20
60. Muntanji TOAD 24,580.50
62 SFB Inc 7,911.80
63 Sierra Grupp Bicycle 19,766.20
63 Sierra Grupp Bicycle 12,763.95
64 Sierra Mountain 8,233.50
54 Bicicletas Aztecas
55 deely MTB Inc

Nota: Xellug barra u Dritt ta ‘barra jingħaqad huma ttrattati b’mod differenti fil-lingwa SQL minn jissieħbu oħrajn tipi. Jekk id-database hija aċċessibbli permezz ODBC, Ġabra Crystal użi sintassi ODBC fid-dikjarazzjoni SQL. Jekk inti qed jaqbdu ma ‘SQL database direttament (mhux permezz ODBC), Rapporti Crystal juża nattiv sintassi għad-database. Għal aktar informazzjoni dwar dak jissieħbu barra jistenna simili fi stqarrija SQL, irreferi għad-dokumentazzjoni Microsoft ODBC jew għad-dokumentazzjoni għall SQL database tiegħek.
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paġna ta ‘qabel paġna li jmiss
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Crystal Reports Online Hulp
Left Outer sluit
Die stel van ‘n Left Outer sluit gevolg sluit al die rekords in die verband veld waarde in beide tafels is ‘n presiese wedstryd. Dit sluit ook ‘n ry vir elke rekord in die tabel primêre (links) waarvoor die gekoppelde veld waarde het geen wedstryd in die lookup tafel. Byvoorbeeld, kan jy ‘n Left Outer sluit aan alle kliënte en die bestellings wat hulle geplaas sien, maar jy het ook ‘n ry vir elke kliënt wat nie enige bestellings geplaas te kry. Hierdie kliënte verskyn aan die einde van die lys met spasies in die velde wat andersins einde inligting sal hou:
Kliënt Table kliënt Table Bestellings Table
Customer ID kliënt Naam Bestel Bedrag
52 Allez Distribution 25141,50
53 BG Berg Inc. 19164,30
53 BG Berg Inc. 1683,60
57 Hansen MTB Inc. 15716,40
58 La Bomba de BICICLETA 1956,20
60 Berg padda 24580,50
62 SFB Inc. 7911,80
63 Sierra Fiets Group 19766,20
63 Sierra Fiets Group 12763,95
64 Sierra Mountain 8233,50
54 bicicletas Aztecas
55 Deely MTB Inc.

Let wel: Left Outer en regs Buite sluit word verskillend hanteer in die SQL taal van ander aan te sluit tipes. As die databasis is toeganklik deur middel van ODBC, Crystal Reports gebruik ODBC sintaksis in die SQL-stelling. As jy verbind is tot ‘n SQL databasis direk (nie deur ODBC), Crystal Reports gebruik ‘n sintaksis inheems aan die databasis. Vir meer inligting oor wat ‘n buitenste sluit lyk in ‘n SQL-stelling, verwys na Microsoft ODBC dokumentasie of die dokumentasie vir jou SQL databasis.
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Crystal Reports Online Ndihmë
Left Outer bashkohen
Rezultati vendosur nga një Outer Left bashkuar përfshin të gjitha të dhënat në të cilat vlera e lidhur fushë në të dy tabelat është një ndeshje e saktë. Ajo gjithashtu përfshin një rresht për çdo rekord në primar (majtas), tavolinë për të cilat vlera e lidhur në terren nuk ka ndeshje në lookup tryezë. Për shembull, ju mund të përdorni një e majtë e jashtme të bashkohen për të parë të gjithë klientët dhe urdhrat që kanë vendosur, por edhe ju të merrni një rresht për çdo klient i cili nuk ka vendosur asnjë urdhër. Këto konsumatorët të shfaqet në fund të listës me boshllëqet në fushat që përndryshe do të mbajnë informacion rendit:
Tabela konsumatorëve Customer Urdhërat Tabela Tabela
Customer ID Customer Emri Order Shuma
52 Allez Distribution 25.141,50
53 BG Mountain Inc. 19.164,30
53 BG Mountain Inc. 1683,60
57 Hansen MTB Inc. 15.716,40
58 La Bomba de bicicleta 1956,20
60 Mountain Toad 24.580,50
62 SFB Inc. 7911,80
63 Sierra Biciklete Group 19.766,20
63 Sierra Biciklete Group 12.763,95
64 Sierra Mountain 8233,50
54 Bicicletas Aztecas
55 Deely MTB Inc.