Database views implement an inner join. The database view provides only those records for which there is an entry in all the tables used in the view. Help views and maintenance views implement an outer join. You can see an example of an inner and outer join in the following figure....
1.1 内连接 ( INNER JOIN )内连接是最常见的一种连接,它也被称为普通连接 返回结果: 1.2 左外连接 (LEFT OUTER JOIN) 返回结果: 1.3 右外连接 ( RIGHT JOIN ) 返回结果: 以上。
既然两个表在逻辑上通过 airln 字段可以关联,建议使用以下 inner join: Select a~airln a~lnnam b~fligh b~cntry into table int_airdet From zairln as a inner join zflight as b on a~airln = b~airln. 这样就可以根据选择条件来限制数据,以上inner join还可以增加 where 条件来进一步限制选择条件。
SAPABAPINNERJOIN多个表详解及代码 inner join(等值连接) 只返回两个表中联结字段相等的行 left join(左联接) 返回包括左表中的所有记录和右表中联结字段相等的记录 right join(右联接) 返回包括右表中的所有记录和左表中联结字段相等的记录 INNER JOIN 语法: INNER JOIN 连接两个数据表的用法: SELECT * FROM...
FDA 从 SAP ABAP 内核 7.42 版本引入,对于一般的 ABAP 开发人员来说是透明的,仅仅能够在 ST05 Execution 里观察到。 上图的执行计划里,我们在 SELECT 语句里只访问了来自 sflight 表的 carrid 和 connid 两个字段,但是从执行计划的蓝色区域能观察到,sflight 和 spfli 的数据库表 INNER JOIN 仍然发生了。
SAP Managed Tags: ABAP Development In an inner join, a line from the left-hand database table or join is only included in the selection if there is one or more lines in the right-hand database table that meet the ON condition <cond>. The left outer join, on the other hand, read...
SAP ABAP Inner Join(Joins) Below ABAP Syntax is ABAP Inner Join example. START-OF-SELECTION. * ASSUMPTION: All quantities are in sales units. Since quantities * are summed to the material group level, it is assumed that all * materials within a material group have the same sales unit of...
0 Kudos 274 SAP Managed Tags: ABAP Development Hai can anyone tell me the diff. between inner join , outer join and left outer-join. and when we use these in select queries. if possible, with an example.Reply 1 ACCEPTED SOLUTION Former Member 2005 Oct 20 1:03 PM 0 Kudos ...
FDA 从 SAP ABAP 内核 7.42 版本引入,对于一般的 ABAP 开发人员来说是透明的,仅仅能够在 ST05 Execution 里观察到。 上图的执行计划里,我们在 SELECT 语句里只访问了来自 sflight 表的 carrid 和 connid 两个字段,但是从执行计划的蓝色区域能观察到,sflight 和 spfli 的数据库表 INNER JOIN 仍然发生了。
Difference between inner join and left outer joins? Former Member 2008 Jan 21 4:34 AM 0 Kudos 11,932 SAP Managed Tags: ABAP Development Hi all, Can anyone explain me the difference between inner join and left outer join with an example. And when shall...