Difference between revisions of "SQL Constraints"
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==See Also== | ==See Also== | ||
| − | [[ALTER TABLE]], [[CREATE TABLE]], [[GRANT]], [[REVOKE]] | + | [[ALTER TABLE]], [[CREATE TABLE]], [[GRANT]], [[Lianja MetaData API]], [[REVOKE]], [[MetaData Editor|Working with MetaData]] |
==Description== | ==Description== | ||
| Line 10: | Line 10: | ||
====Table Constraints==== | ====Table Constraints==== | ||
| − | {| class="wikitable" | + | {| class="wikitable" width="100%" |
| − | |[[CHECK Table Constraint|CHECK | + | |[[CHECK Table Constraint|CHECK]] |
|- | |- | ||
| − | |[[ | + | |[[ERROR Table Constraint|ERROR]] |
|- | |- | ||
| − | |[[ | + | |[[FOREIGN KEY Table Constraint|FOREIGN KEY]] |
|- | |- | ||
| − | |[[ | + | |[[INDEX Table Constraint|INDEX]] |
|- | |- | ||
| − | |[[ | + | |[[KEY Table Constraint|KEY]] |
| + | |- | ||
| + | |[[ONAFTERDELETE Table Constraint|ONAFTERDELETE]] | ||
| + | |- | ||
| + | |[[ONAFTERINSERT Table Constraint|ONAFTERINSERT]] | ||
| + | |- | ||
| + | |[[ONAFTERUPDATE Table Constraint|ONAFTERUPDATE]] | ||
| + | |- | ||
| + | |[[ONCLOSE Table Constraint|ONCLOSE]] | ||
| + | |- | ||
| + | |[[ONBEFOREDELETE Table Constraint|ONBEFOREDELETE]] / [[ONDELETE Table Constraint|ONDELETE]] | ||
| + | |- | ||
| + | |[[ONBEFOREINSERT Table Constraint|ONBEFOREINSERT]] / [[ONINSERT Table Constraint|ONINSERT]] | ||
| + | |- | ||
| + | |[[ONOPEN Table Constraint|ONOPEN]] | ||
| + | |- | ||
| + | |[[ONBEFOREUPDATE Table Constraint|ONBEFOREUPDATE]] / [[ONUPDATE Table Constraint|ONUPDATE]] | ||
| + | |- | ||
| + | |[[PRIMARY KEY Table Constraint|PRIMARY KEY]] | ||
| + | |- | ||
| + | |[[UNIQUE Table Constraint|UNIQUE]] | ||
|- | |- | ||
|} | |} | ||
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====Column Constraints==== | ====Column Constraints==== | ||
| − | {| class="wikitable" | + | {| class="wikitable" width="100%" |
| − | |[[AUTO_INCREMENT Column Constraint|AUTO_INCREMENT]]||[[AUTOINC Column Constraint|AUTOINC]]||[[CALCULATED Column Constraint|CALCULATED]] | + | |[[AUTO_INCREMENT Column Constraint|AUTO_INCREMENT]] |
| + | |- | ||
| + | |[[AUTOSUGGESTIONS Column Constraint|AUTOSUGGESTIONS]] | ||
| + | |- | ||
| + | |[[AUTOSUGGESTIONHEADERS Column Constraint|AUTOSUGGESTIONHEADERS]] | ||
| + | |- | ||
| + | |[[AUTOINC Column Constraint|AUTOINC]] | ||
| + | |- | ||
| + | |[[CALCULATED Column Constraint|CALCULATED]] | ||
| + | |- | ||
| + | |[[CHECK Column Constraint|CHECK]] | ||
| + | |- | ||
| + | |[[CHECKUNIQUE Column Constraint|CHECKUNIQUE]] | ||
| + | |- | ||
| + | |[[CHOICES Column Constraint|CHOICES]] | ||
| + | |- | ||
| + | |[[DEFAULT Column Constraint|DEFAULT]] | ||
| + | |- | ||
| + | |[[DESCRIPTION Column Constraint|DESCRIPTION]] | ||
| + | |- | ||
| + | |[[ERROR Column Constraint|ERROR]] | ||
| + | |- | ||
| + | |[[FOREIGN KEY Column Constraint|FOREIGN KEY]] | ||
| + | |- | ||
| + | |[[GETDATAMAPPING Column Constraint|GETDATAMAPPING]] | ||
| + | |- | ||
| + | |[[HELP Column Constraint|HELP]] | ||
| + | |- | ||
| + | |[[NOCPTRANS Column Constraint|NOCPTRANS]] | ||
| + | |- | ||
| + | |[[NOT NULL Column Constraint|NOT NULL]] | ||
| + | |- | ||
| + | |[[NULL Column Constraint|NULL]] | ||
| + | |- | ||
| + | |[[PICTURE Column Constraint|PICTURE]] | ||
| + | |- | ||
| + | |[[PRIMARY KEY Column Constraint|PRIMARY KEY]] | ||
| + | |- | ||
| + | |[[RANGE Column Constraint|RANGE]] | ||
|- | |- | ||
| − | |[[ | + | |[[RECALCULATE Column Constraint|RECALCULATE]] |
|- | |- | ||
| − | |[[ | + | |[[REFERENCES Column Constraint|REFERENCES]] |
|- | |- | ||
| − | |[[ | + | |[[SET CHECK Column Constraint|SET CHECK]] |
|- | |- | ||
| − | |[[ | + | |[[SETDATAMAPPING Column Constraint|SETDATAMAPPING]] |
|- | |- | ||
| − | + | |[[UNIQUE Column Constraint|UNIQUE]] | |
|- | |- | ||
|} | |} | ||
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[[Category:SQL|Constraints]] | [[Category:SQL|Constraints]] | ||
[[Category:Reference]] | [[Category:Reference]] | ||
| + | [[Category:Database Triggers]] | ||
| + | [[Category:Metadata API]] | ||
Latest revision as of 04:39, 1 July 2020
Purpose
To define rules that help to provide data integrity
See Also
ALTER TABLE, CREATE TABLE, GRANT, Lianja MetaData API, REVOKE, Working with MetaData
Description
A constraint is used to define rules that help to provide data integrity. There are two different types of constraints, TABLE constraints, which do not require any column information and column constraints, which are specific to the column name specified. You must have ALTER privilege on the table. The table will be locked for EXCLUSIVE use during the operation.
Table Constraints
| CHECK |
| ERROR |
| FOREIGN KEY |
| INDEX |
| KEY |
| ONAFTERDELETE |
| ONAFTERINSERT |
| ONAFTERUPDATE |
| ONCLOSE |
| ONBEFOREDELETE / ONDELETE |
| ONBEFOREINSERT / ONINSERT |
| ONOPEN |
| ONBEFOREUPDATE / ONUPDATE |
| PRIMARY KEY |
| UNIQUE |
