db2 right outer join

Resolution: inline, left outer, right outer, full join, Cross join difference bitsCN.com Connections include: internal connection, external connection, and cross connection.I. inner connection-the most commonDefinition:Only the rows in the two tables that meet the connection

. External Connection1. Left (outer) joinDefinition: Based on the internal join, it also contains all data rows that do not meet the conditions in the left table, and fill in NULL in the right table column.Keyword: LEFT JOINEg:Select *From t_institution ILeft outer join t_te

| PK_T_CAPITAL_DISTRI_TYPE | 1 | | || 34 | TABLE ACCESS BY INDEX ROWID | T_CONTRACT_PRODUCT | 1 | 10 | 2 (50)||* 35 | INDEX UNIQUE SCAN | PK_T_CONTRACT_PRODUCT | 1 | | 1 (0)|| 36 | TABLE ACCESS BY INDEX ROWID | T_PRODUCT_LIFE | 1 | 14 | 2 (50)||* 37 | INDEX UNIQUE SCAN | PK_T_PRODUCT_LIFE |

Produces a collection that is available in table A and not in the B table. 4.RIGHT [OUTER] JOINRight OUTERJoin is based on the following table, similar to the left OUTER join usage. This is not covered here.5.UNIONAndUNION AllThe UNION operator is used to combine the result set of two or more SELECT statem

. External Connection1. Left (outer) joinDefinition: Based on the internal join, it also contains all data rows that do not meet the conditions in the left table, and fill in NULL in the right table column.Keyword: LEFT JOINEg:Select *From t_institution ILeft outer join t_te

Differences between inner join, left JOIN, right join, outer join in SQLFor example, you'll know!Table A (A1,B1,C1) b (A2,B2)A1 B1 C1 A2 B201 Mathematics 95 01 Sheets Three02 Language 90 02 John Doe English Harry Select A.*, b.* f

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 B15B3Ten8A1 B15B329A1 B15B52TenA1 B26B13 OneA1 B26B2

The relationship between the employee and the boss in the EMP tableInternal connections:The inner join is also called a natural connection, which is a common method of combining two tables. A natural connection compares columns in two tables, combining rows in two tables that meet the conditions of the join, as a result. A natural connection has two forms of syntax.Select E1.ename,e1.mgr,e2.ename AA from EM

1. Internal connection is simpleSelect A.*, b.* from, b where a.id = b.IDSelect A.*, b.* from A inner join B on a.id = b.IDThe above two sentences are completely equivalent.2. Left Outer connectionSELECT * FROM EMP a LEFT JOIN Dept D on A.deptno=d.deptnoSELECT * from emp a,dept D where A.deptno=d.deptno (+)The above two sentences are completely equivalent.3.

is as follows: SELECT * from A joins B on A.aid=b.bnameid run results as shown in 4: actually select * from A, A where a.aid= B.bnameid and select * from A JOIN B on A.aid=b.bnameid run the same result.Figure 4: Internal connection data2. Outer joins: There are two types of outer joins, one is the left join and the

Database Operation statement 7. Outer Join-cross Query 7.1 Query 7.2 equijoin 7.3 right Outer Join 7.4 left Outer Join 7.5 update operations Introduction: External Connection and self-

Tags: style blog c http a widthFor SQL joins, learning may be a bit confusing. We know that the join syntax for SQL has a lot of inner, outer, left, and sometimes it's not very clear what the result set looks like for a select. There is an article on Coding horror that explains the join of SQL through the Venn diagrams of the Venturi diagram. I feel clear and und

Tags: implementing base STS exist RAC multiple expressions Images Example Read Catalogue 1. Preparatory work 2. Left outer connection (OUTER Join/left join) 3. Right outer connection (

Oracle External connections(1) Left outer connection (the table on the left is unrestricted)(2) Right outer connection (no restriction on the right table)(3) Full-outer connection (no restriction on both the left and right tables)

Tags: title tab ACL Insert full TPS values image varchar2Oracle outer JOIN (OUTER join) Left OUTER join (the table on the left is unrestricted) Right

Oracle External connections(1) Left outer connection (the table on the left is unrestricted)(2) Right outer connection (no restriction on the right table)(3) Full-outer connection (no restriction on both the left and right tables)

Tags: MySQL left join left OUTER join right outer JOINLeft Outer connection:A left Jion B on a.id=b.id is a table data is not moving, B can and a corresponding to the data added to a table dataand the

Mysql left jion: that is, left outer join (same as right join), jionouter Left Outer Join: A left jion B on A. id = B. id indicates that the data in Table A does not move. After adding the data in Table B to table A correspondin

Tags: mysql name join SQL DEP right Outer connection outer JOIN query left JOINLeft outer connection: (Based on left table)When two tables are connected, the connection conditions do not match.Leave the data in the left table, and

Tags: matching from supplement implementation select ROM left connection ACL outLeft Outer connection (outer join/left join)SELECT * from a LEFT join B on a.id = b.ID;SELECT * from a b where a.id = b.ID (+);With (+) to achieve, the + number can be understood as follows: + to