difference between inner join and outer join

is not based on who, it only shows records that match the criteria.--------------------------------------------Note:The left JOIN operation is used to combine records from the source table in any from clause. Use the left JOIN operation to create an outer join of the side. The left

that inner join is not based on who, it only shows records that match the criteria.--------------------------------------------Note:The left JOIN operation is used to combine records from the source table in any from clause. Use the left JOIN operation to create an outer

20060324012 a20050112 2 20060324023 a20050113 3 20060324034 a20050114 4 2006032404NULL NULL 8 2006032408(The number of rows affected is 5 rows) result Description: Look closely, you will find that the result of the left join is exactly the opposite, this time is based on the right table (B), a table is not sufficient place with null padding. --------------------------------------------3.inner

Table AAid Adate1 A12 A23 A3TableBBid 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 join means:SELECT * from a LEFT join B on a.aid = B.bidFi

There are contests (contest_id, hacker_id, name), colleges (college_id, contest_id), Challenges (challenge_id, college_id), View_ Stats (challenge_id, total_views, Total_unique_views), Submission_stats (challenge_id, Total_submissions, Total_ accepted_submissions) Table Output Required: 1, contest_id, hacker_id, name, Total_submissions and, Total_accepted_submissions and, Total_views and 2, contest_id Ascending Sql: Select con.contest_id, con.hacker_id, Con.name, sum (t2.sumtotalsubmissions), su

Tags: hibernate hql inner join left right Category: SQL Original address: Http://m33707.iteye.com/blog/829725Select from [Outer] The join on the left join returns all rows in "left_table" although there is no matching data in "right_t

2006032401 2 A2 0050112 2 2006032402 3 a20050113 3 2006032403 4 a20050114 4 2006032404 result description: It is clear that only a.aid = B.bid records are shown here. This shows that inner join is not based on who, it only shows records that match the criteria. -------------------------------------------- Note: The left JOIN operation is used to combi

, 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 outer

(). iterator (). Next (); Another important thing to know are that you can only fetch one collection reference in a query. That means you can just the use one fetch join. Can however fetch "one" references in addition, as this sample from the Hibernate Docs demonstrates: From eg. Cat as Cat INNER JOIN Fetch Cat.mate Left JOI