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. Righ
Tags: table cartesian outer data str name OSS PHP altBy default, the inner join, the left join and the right join used in development belong to the outer join, and the outer
9.3.4 Outer joins (OUTER join)
Multiple table queries, whether inline or with a WHERE clause, are grouped together from multiple tables and generate a result table. In other words, if a row in any one of the source tables does not match in another source table, the DBMS will not place the row in the final result table.
An out
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,
Tags: find php yourself join where difference intersection from HTMTransfer from http://www.phpddt.com/db/inner_join-outer-join.html The difference between inner join, outer join, and Cross join in SQL many people do not know, I a
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 loo
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
Tags: share where select HTTP filter png same PHP outBy default, the inner join, the left join and the right join used in development belong to the outer join, and the outer join also i
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 Outer
In the following post, innerjoin = where = join
Http://baike.360.cn/4241488/12057813.html
Http://z.baidu.com/question/46996912.html? SI = 1
The connection statement used in the WHERE clause is called a recessive connection in the database language. Inner join ...... The connection generated by the on clause is called an explicit connection. (Other join paramet
1. A. Union select Column1, column2 from table1 Union select Column1, column2 from Table2 B. Intersection join SELECT * FROM table 1 as a JOIN table2 B on A.name=b.name c. No in SELECT * "from table1 WHERE name does not" (SELECT name from table2) d. Cartesian product The SELECT * FROM table1 CROSS JOIN table2 is the same as the select * from Table1,table2 2. The
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, and the
Difference between left Outer join and Outer Association (+) in "original" Oracle 2008-03-23 16:22:37
url:http://space.itpub.net/?uid-6517-action-viewspace-itemid-216974
difference between on and where in Oracle's left join 2009-09-28 15:20
Url:http://hi.baidu.com/bfsll/blog/item/3a884e2f0fc905321e3089a7.html
Tod
An introduction to the differences between inner join, outer join, and Cross join in SQL:There are two tables, table A is the one on the left. Table B is the list on the right. Each of them has four records, of which two records have the same name:The result of the 1.INNER JOIN
External Association is a proprietary statement of the Oracle databaseThe left Outer join is the standard statement of the SQL-92These two SQL are generally considered to be equivalent, but there are some subtle differences.In general, the equivalent condition of the outer association is equivalent to the ON statement in the left
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.