OPEN SQL

????????? 目的:避免不同的數(shù)據(jù)庫表直接的不兼容性，使 ABAP/4 程序能在應(yīng)用中獨(dú)立于數(shù)據(jù)庫系統(tǒng)。

數(shù)據(jù)庫操作

SELECT 語句

SELECT???? <result>
INTO?????? <target>
FROM?????? <source>
[WHERE???? <condition>]
[GROUP BY <fields>]
[HAVING?? <cond>]
[ORDER BY <fields>].

WHERE 語句

????????? BETWEEN <g1> AND <g2>

????????? LIKE <g> ?????????? _ 表示一個(gè)字符

?????? ???????????????????????? % 表示一個(gè)字符串

????????? IN (<g1>….<g2>)

多表結(jié)合查詢??????? ???????

<???? ??INNOR JOIN

SELECT … FROM table [INNER] JOIN jointable1 [AS aliasA] ON <cond>

SELECT p~carrid p~connid f~fldate

INTO CORRESPONDING FIELDS OF TABLE itab

FROM (spfli AS p

???????????? INNER JOIN sflight AS f ON p~carrid = f~carrid AND

?????????????????????????????????????? p~connid = f~connid??? )

WHERE p~cityfrom = 'FRANKFURT' AND

??????? p~cityto?? = 'NEW YORK' .

數(shù)據(jù)庫操作

INSERT 語句

????????? INSERT <database> FROM <wa> .

????????? INSERT <database> FROM TABLE <itab> [ACCEPTING DUPLICATE KEY]

UPDATE

????????? UPDATE <database> FROM <wa>

????????? UPDATE <database> FROM TABLE <itab>

????????? UPDATE <database> SET < f1>=<values>… WHERE <condition>

MODIFY

????????? MODIFY <database> FROM <wa>

????????? MODIFY <database> FROM TABLE <itab>

DELETE

????????? DELETE <database> FROM <wa>

????????? DELETE <database> FROM TABLE <itab>

????????? DELETE FROM <database> WHERE <condition>

幾個(gè)TCODE

????????? SE11/SE12/SE13/SE14/SE15 數(shù)據(jù)字典維護(hù)相關(guān)

????????? SE16/SE17??? 查看表數(shù)據(jù)

????????? SE30???????? ABAP運(yùn)行分析

????????? SE32???????? 文本維護(hù)

????????? SE37??????? 維護(hù)函數(shù)

????????? SE38???????? ABAP編輯器

????????? SE39???????? 程序比較

????????? SE80???????? ABAP對象編輯器

????????? SE91???????? 維護(hù)消息類和消息

????????? SE93???????? 給程序維護(hù)TCODE

????????? SM36???????? 定義后臺job

????????? SM37???????? 查看后臺job

總結(jié)

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