db2 left join

Usage of the join keyword in the LINQ query expression: Here I will first create an experiment case: class Customer{ public int CustomerId { get; set; } public string Name { get; set; } public int Age { get; set; }}class Product{ public int ProductId { get; set; } public string Name { get; set; } public string Origin { get; set; }}class Order{ public int OrderId { get; set; } public int CustomerId { get; set; } public List

Tags: style color using OS strong data for ARINNER 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

ArticleFrom: http://www.cnblogs.com/c-jquery-linq-sql-net-problem/archive/2011/01/17/LINQ_Inner_Join_Group_Join_Left_Join.html We often use inner join, left join, Cartesian Product, and so on during SQL queries. I don't need to explain the concept of the connection method too much, Today, we focus on familiarizing you with how to use

Table A records the following: Aid anum1 a200501112 a200501123 a200501134 a200501145 a20050115 Table B records the following:Bid bname1 20060324012 20060324023 20060324034 20060324048 2006032408The experiment is as follows:1. Left joinThe SQL statement is as follows: Select * From A Left Join B On A. Aid = B. Bid The result

The 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 include all records in the right table and the junction fields in the left table;INNER

Left join returns records that include all records in the left table and join fields in the right table.Right join returns records that include all records in the right table and the joined fields in the left table.Inner

Tags: value into table blog varchar ble PNG system img JOIN: Returns a row if there is at least one match in the table Left JOIN: Returns all rows from the table, even if there is no match in the right table Right JOIN: Returns all rows from the correct table even if there is no match in the

Left 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

Tags: sql SQ between join Col equivalent connection color none widthDifferences between LEFT JOIN, right join, inner join in SQL　The LEFT join is returned, including　 Records of all