db2 right outer join

Tags: filter Another view specify equals logs related session recordThe join condition can be specified in the From or WHERE clause, and it is recommended that the join condition be specified in the FROM clause. The WHERE and having clauses can also contain search conditions to further filter the rows selected by the join condition.Joins can be divided into the f

For example: Table A have 12 (8 + 4) entries, 8 entries have valid relation with BTable B have 80 (77 + 3) entries, 77 entries have valid relation with. Then the return amount of join is:Cross join: 12*80Inner join: 77Full outer join: 77 + 4 + 3Left

For example: Hive> select * From zz0;111111222222888888Hive> select * From zz1;111111333333444444888888 Hive> select * From zz0 join zz1 on zz0.uid = zz1.uid;111111 111111888888 888888Hive> select * From zz0 left Outer Join zz1 on zz0.uid = zz1.uid;111111 111111222222 null888888 888888Hive> select * From zz0 right

is[Email protected]> select * from a LEFT outer join B on A.A=B.A;A B C a D E---------- ---------- ---------- ---------- ---------- ----------1 1 1 1 4 42 2 2 2 5 53 3 34. Right outer connection[Email protected]> select * from a b where A.A (+) =B.A;Another way to do this is[Email protected]> Select * from a

. Specify the inner join of the condition, returning only entries that meet the join condition. The outer joins are different, and the results returned include not only the rows that meet the join criteria, but all rows of data on the left table (when the left outer

TABLE EMPModify ename NOT null; --drop NOT NULL ContraintALTER TABLE EMPModify ENAME null;--drop constraintALTER TABLE EMPDrop constraint unique (name);ALTER TABLE EMPDrop constraint Fk_emp_deptno;--Disabling constraintsALTER TABLE EMPDisable constraint Fk_emp_deptno;--Enable constraintsALTER TABLE EMPEnable constraint Fk_emp_deptno;--oracle connection divided into inner join (inner join)

Four types of connections to SQL-left outer, right outer, inner, fully connected Today, when I look at a data table for a legacy system, I find that the view we are looking for is full out join. Cause the usual data records to do some restrictive processing, you can also set the view tables to the

first, data constructionFirst build the table, then talk.Create DatabaseTest UseTestCreate TableA (AIDint Identity(1,1)Primary Key, namenvarchar( -), ageint)Create TableB (BIDint Identity(1,1)Primary Key, namenvarchar( -), Genderint)After creation, insert dataInsertA (Name,age)Values('Zhang San', *)InsertA (Name,age)Values('John Doe', -)InsertA (Name,age)Values('XXX', *)InsertA (Name,age)Values('YYY', *)InsertB (Name,gender)Values('Zhang San',1)InsertB (Name,gender)Values('John Doe',1)InsertB (N

Tags: load http Select detail LAN margin src lin bleExcerpt from: http://blog.csdn.net/scythe666/article/details/51881235 By default, the inner join, the left join and the right join used in development belong to the outer join, a

Tags: arch sort important Specify post right connection contains another further Today, when looking at a data sheet of a legacy system, we find that the view that we look for is a full-out join, which results in some restrictive processing of the data records, and can also be achieved by setting the view tables as right oute