Grundlagen der SQL-Programmierung mit Microsoft - dFPUG

SQL-Befehle von FoxPro
Grundlagen der SQLProgrammierung mit
Microsoft Visual FoxPro
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Diese Schulung dient zur Einführung in
die Grundlagen der Standard Query
Language (SQL) und deren
Anwendung in
Microsoft Visual FoxPro
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Themenübersicht
Defintionen
 CREATE TABLE
 ALTER TABLE
 SQL-SELECT
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Umfangreichere Befehle
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USE
 Norequery, Nodata
 Online, Admin
CREATE TABLE
 ALTER TABLE
 SQL-SELECT
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 WHERE, GROUP/HAVING, JOINS
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SQL-Historie
 in den 70ern von IBM entwickelt
 1986 1.ANSI Standard
 1987 ISO Standard
 1989 2. ANSI Standard, Level I und II
 1992 3.ANSI Standard, SQL2
 an SQL3 wird zur Zeit gearbeitet
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SQL-Create
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CREATE TABLE TableName1
NAME LongTableName [FREE]
(FieldName1 FieldType (nFieldWidth , nPrecision)
NULL | NOT NULL
CHECK ERROR cMessageText1
DEFAULT Wert
PRIMARY KEY | UNIQUE
REFERENCES TableName2 TAG TagName1
NOCPTRANS
FOREIGN KEY eExpression4 TAG TagName4 [NODUP]
FROM ARRAY ArrayName
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SQL-AlterTable
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ALTER TABLE TableName1
[ADD / ALTER / DROP [COLUMN] FieldName3]
[SET CHECK lExpression3 [ERROR cMessageText3]]
[DROP CHECK]
[ADD PRIMARY KEY eExpression3 TAG TagName2]
[DROP PRIMARY KEY]
[ADD UNIQUE eExpression4 [TAG TagName3]]
[DROP UNIQUE TAG TagName4]
[ADD FOREIGN KEY [eExpression5] TAG TagName4
REFERENCES TableName2 [TAG TagName5]]
[DROP FOREIGN KEY TAG TagName6 [SAVE]]
[RENAME COLUMN FieldName4 TO FieldName5]
[NOVALIDATE]
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SQL-Select
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SELECT [ALL | DISTINCT] [TOP nExpr [PERCENT]]
[Alias.] Select_Item [AS Column_Name]
FROM [FORCE] [DatabaseName!]Table [Local_Alias]
[[INNER | LEFT [OUTER] | RIGHT [OUTER] | FULL [OUTER] JOIN
DatabaseName!]Table [Local_Alias] [ON JoinCondition …]
[[INTO Destination] [TO FILE [ADDITIVE] | TO PRINTER [PROMPT]
[PREFERENCE PreferenceName]
[NOCONSOLE] [PLAIN] [NOWAIT]
[WHERE JoinCondition [AND / OR JoinCondition ...]
[GROUP BY GroupColumn [, GroupColumn ...]]
[HAVING FilterCondition]
[UNION [ALL] SELECTCommand]
[ORDER BY Order_Item [ASC | DESC]
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Vielen Dank!
Das waren die Themen:

Historie
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CREATE
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ALTER TABLE

SELECT
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Wenn Fragen bestehen:
Wizards & Builders
Methodische SoftwareEntwicklung GmbH
Frankfurter Str. 21b
61476 Kronberg
Tel.: 06173-950906
Fax: 06173-950907
CIS: 101605,175
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Builders GmbH