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。
leftjoin(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 rightjoin(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 INNERJOIN语法: INNERJOIN连接两个数据表的用法: SELECT*FROM表1INNERJOIN表2ON表1.字段号=表2.字段号 INNERJOIN连接三个数据表的用法: SELECT*FROM(表1INNERJOIN...
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。
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 表 1 INNER JOIN 表 2 ON 表...
SAP ABAP 性能优化技巧 — 正确使用”inner join” 2009-08-03 19:32 −当多个 SAP 表在逻辑上关联的时候,总是建议使用右关联 inner join 来从中读取数据。这会降低网络的负载。 以两个表为例:zairln 和 zflight。表 zairln 有字段 airln 存储了航空公司的代码,和字段 lnnam 存储了航空公司的名称。
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。
The join syntax represents a recursively nestable join expression. A join expression consists of a left-hand and a right- hand side, which are joined either by means of [INNER] JOIN or LEFT [OUTER] JOIN . Depending on the type of join, a join expression can be either an inner ( INNER...
The data that can be selected with a view depends primarily on whether the view implements an inner join or an outer join. With an inner join, you get only the records of the cross-product for which there is an entry in all tables used in the view. With an outer join, the system ...
If you still want to keep VBAK rows for which there are no matching VBAP rows, you need to use the OUTER JOIN construct available in ABAP/4 Open SQL in 4.x.. Hi Syntax ... [(] {dbtab_left [AS tabalias_left]} | join {[INNER] JOIN}|{LEFT [OUTER] JOIN} {dbtab_right [AS...
SAP Managed Tags: ABAP Development Hi Ajay, could you please be clear on the requirement as this is not possible in ABAP because you can only give inner join with tables and not the records of the tables... mention properly as to what you want and we can give you the query... Re...