db2 inner join

statement is as follows: Select * from A Right Join b on a.aid = B.bid The results are as follows: AID anum BID bname 1 A1 NBSP;NBS　P 1 NBSP;B1 2 a2 2 NB Sp B2 3 A3 NBSP;NBSP; 3 B3 null null NBSP; 8 B8 (The number of rows affected is 4 rows)Result Description:Looking closely, you will find that the result of the left join is exactly the opposite, t

Reprint Address: http://www.phpddt.com/db/inner_join-outer-join.html respect for the work of others is to respect their own achievements!The difference between inner join, outer join, and Cross join in SQL many people do not know, I also ask, just look for information to look at, with their previous understanding, if y

Tags: case ble add left join Karl Baidu Oss intersection useUsing the Join table, the defect is inner join, the left join used in development and the right join belong to outer join,out

of the left table (A) will all be represented, and the right table (B) will only display records that match the search criteria (in the example: A.aid = b.bid).The low-record of table B is null.--------------------------------------------2.right JoinThe SQL statements are as follows:SELECT * FROM ARight Join BOn a.aid = B.bidThe results are as follows:AID Anum BID bname1 a20050111 1 20060324012 a20050112 2 20060324023 a20050113 3 20060324034 a2005011

records of the left table (A) will all be represented, and the right table (B) will only display records that match the search criteria (in the example: A.aid = b.bid).The low-record of table B is null.--------------------------------------------2.right JoinThe SQL statements are as follows:SELECT * FROM ARight Join BOn a.aid = B.bidThe results are as follows:AID Anum BID bname1 a20050111 1 20060324012 a20050112 2 20060324023 a20050113 3 20060324034

the right table, and B can be regarded as left table.In other words, the records of the left table (A) will all be represented, and the right table (B) will only display records that match the search criteria (in the example: A.aid = b.bid).The low-record of table B is null.--------------------------------------------2.right JoinThe SQL statements are as follows:SELECT * FROM ARight Join BOn a.aid = B.bid The results are as follows:AID Anum BID bname

of the left table (A) will all be represented, and the right table (B) will only display records that match the search criteria (in the example: A.aid = b.bid).The low-record of table B is null.--------------------------------------------2.right JoinThe SQL statements are as follows:SELECT * FROM ARight Join BOn a.aid = B.bidThe results are as follows:AID Anum BID bname1 a20050111 1 20060324012 a20050112 2 20060324023 a20050113 3 20060324034 a2005011

Tags: description database table selection No related detailed associated demo postFirst, let's look at some of the simplest examples. Example Table AAid Adate1 A12 A23 A3 TableB Bid Bdate1 B12 B24 B4Two tables A, B connected, to remove fields with the same IDSELECT * from a INNER join B on a.aid = B.bid This is only the matching data is taken out.At this point, the removal is:1 A1 B12 A2 B2Then the left

Tags: assigning local data comparison operator mem Quick object Pop resultINNER JOIN (equivalent join) returns only rows that have the same join field in two tablesLeft join returns records that include all the records in the left table and the equivalent of the junction fields in the right tableRight

Label:First borrow the official explanation under: Inner JOIN (equivalent connection): Returns only rows with the same junction field in two tables; Left join: Returns records that include all records in the left table and the equivalent of the junction fields in the right table; Right join: Returns records that includ

Tags: left joins right join INNER JOINLeft join returns records that include all the records in the left table and the equivalent of the junction fields in the right tableRight join returns records that include all records in the right table and the junction fields in the left tableINNER

Label:The difference between inner join, outer join, and Cross join in SQL many people do not know, I also ask, just look for information to look at, with their previous understanding, if you use join table, the case of defects is inner