sql full outer join

: FULL OUTER JOIN ).Select o. ID, O. ORDER_NUMBER, O. CUSTOMER_ID, C. ID, C. NAMEFrom orders o full outer join MERs c on c. ID = O. CUSTOMER_ID;Note: MySQL does not support all external connections. The method provided here is sui

In-depth understanding of four SQL connections-left outer join, right outer join, inner join, and full link bitsCN.com 1. INNER JOIN(Typical

table to the WHERE clause. Statement 9: Full outer join ).Select O. ID, O. order_number, O. customer_id, C. ID, C. NameFrom orders o full outer join MERs C on C. ID = O. customer_id;Note: MySQL does not support all external conne

SQL left Outer Join, right Outer Join, full join, internal joinThe connection conditions can be specified in the from or where clause. We recommend that you specify the connection condi

23 12 Li Si 2 34 2Null 3 34 43 Wang Wu null SQL code DECLARE @ ta table (ida int, va varchar (10) DECLARE @ tb table (idb int, vb varchar (10) Insert into @ TASELECT1, 'A' UNION SELECT2, 'Bc' UNION SELECT3, 'Ccc 'insert into @ TBSELECT1, '2' UNION SELECT3, '58 'UNION SELECT4, '67' -- simple syntax for the inner join: select. IDA,. VA, B. IDB, B. vb from @ ta a, @ tb bwhere. IDA = B. IDB -- Inner

. au_lname, P. pub_nameFrom authors as a inner join publishers as POn a. City = P. CityAnd a. State = P. StateOrder by A. au_lname ASC, A. au_fname ASC Tables or views in the from clause can be specified in any order through internal connections or complete external connections. However, when you connect to a specified table or view from the left or right, the order of tables or views is very important. For more information about using Left or Right

match a row in the right table, all selection list columns in the right table in the row of the associated result set are null. Right join or right outer join.The right outer join is the reverse join of the left Outer

Original link: http://www.powerxing.com/sql-join/In general, the use/difference of four joins can be described as: The LEFT join returns all records from the table (shop), even if there are no matching rows in the right table (Sale_detail). Right outer join, ret

Joins are divided into:INNER JOIN???????????????????????? [INNER JOIN]Outer JOIN???????? (left outer join, right outer join)???????? [Left

Cross Jointable2Select * fromTable1,table2--The following three statements have the same effectSelect * fromTable1 A,table2 bwhereb.ID=a.idSelect * fromTable1 A Cross JoinTable2 bwhereb.ID=a.idSelect * fromTable1 AInner JoinTable2 b onb.ID=a.ID2 Cross Apply,outer apply(Cross Apply,outer apply is new in SQL Server 2005)There is a cross

Tags: Connection Method field name comparison field record right outer connection outer JOIN mode use 1-- inner connection: INNER JOIN It represents a matching record that returns two tables or Recordset join fields, representing the portions of the two tables that are cont

element in a to match the result of all elements in B, that is, the n*m combination. SELECT * from A cross JOIN B AA BB -------- -------- Item 1 Item 3 ^ Item 1 Item 4 +--- the first element in a, matching all elements in B Item 1 Item 5 | Item 1 Item 6 v Item 2 Item 3 ^ Item 2 Item 4 +--- a second element that matches all elements in B Item 2 Item 5 | Item 2 Item 6 v

Rutabaga Pirate Darth Vade Ninja All listed. (3) Note:SELECT * from TableAUNIONSELECT * from TableB new result set ID name 1 Pirate 2 Monkey 3 Ninja 4 spaghetti 1 rutabaga 2 Pirate 3 Darth vade

NULL NULL NULLB524. Fully connected1 Select * fromT1 Full outer JoinT2 onT1. B=t2.b2 3 A b C B E4 ---------- ---------- ---- ---------- ----5A1 B15B136A1 B26B277A2 B38B3Ten8A2 B38B329A2 B4 A NULL NULLTen NULL NULL NULLB525. Cross connection (Cartesian product)1 Select * fromT1 Cross JoinT22 3 A b C B E4 ---------- ---------- ---- ---------- ----5A1 B15B136A1 B15B277A1 B15B3Te

, the final result Figure 6 can be seen in the aid and aname non-null records are in Figure 3 public part of the record set C The record of aid and ANAME null for aid 11 is the Bnameid that exists in table B recordset B1.(3) Full join or complete OUTER join (fully connected).A full