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- Update_(SQL) abstract "An SQL UPDATE statement changes the data of one or more records in a table. Either all the rows can be updated, or a subset may be chosen using a condition.The UPDATE statement has the following form:UPDATE table_name SET column_name = value [, column_name = value ...] [WHERE condition]For the UPDATE to be successful, the user must have data manipulation privileges (UPDATE privilege) on the table or column and the updated value must not conflict with all the applicable constraints (such as primary keys, unique indexes, CHECK constraints, and NOT NULL constraints).In some databases, such as PostgreSQL, when a FROM clause is present, what essentially happens is that the target table is joined to the tables mentioned in the fromlist, and each output row of the join represents an update operation for the target table. When using FROM, one should ensure that the join produces at most one output row for each row to be modified. In other words, a target row shouldn't join to more than one row from the other table(s). If it does, then only one of the join rows will be used to update the target row, but which one will be used is not readily predictable.Because of this indeterminacy, referencing other tables only within sub-selects is safer, though often harder to read and slower than using a join.".
- Update_(SQL) wikiPageID "1220573".
- Update_(SQL) wikiPageLength "4184".
- Update_(SQL) wikiPageOutDegree "13".
- Update_(SQL) wikiPageRevisionID "645787532".
- Update_(SQL) wikiPageWikiLink Category:Articles_with_example_SQL_code.
- Update_(SQL) wikiPageWikiLink Category:SQL_keywords.
- Update_(SQL) wikiPageWikiLink Check_constraint.
- Update_(SQL) wikiPageWikiLink Condition_(SQL).
- Update_(SQL) wikiPageWikiLink Database_index.
- Update_(SQL) wikiPageWikiLink From_(SQL).
- Update_(SQL) wikiPageWikiLink Halloween_Problem.
- Update_(SQL) wikiPageWikiLink Infinite_loop.
- Update_(SQL) wikiPageWikiLink Null_(SQL).
- Update_(SQL) wikiPageWikiLink PostgreSQL.
- Update_(SQL) wikiPageWikiLink SQL.
- Update_(SQL) wikiPageWikiLink Table_(database).
- Update_(SQL) wikiPageWikiLink Unique_key.
- Update_(SQL) wikiPageWikiLinkText "SQL UPDATE".
- Update_(SQL) wikiPageWikiLinkText "UPDATE".
- Update_(SQL) wikiPageWikiLinkText "Update (SQL)".
- Update_(SQL) wikiPageWikiLinkText "Update".
- Update_(SQL) wikiPageWikiLinkText "Update_(SQL)".
- Update_(SQL) wikiPageWikiLinkText "update".
- Update_(SQL) wikiPageWikiLinkText "updates".
- Update_(SQL) wikiPageUsesTemplate Template:Database-stub.
- Update_(SQL) wikiPageUsesTemplate Template:Reflist.
- Update_(SQL) wikiPageUsesTemplate Template:SQL.
- Update_(SQL) subject Category:Articles_with_example_SQL_code.
- Update_(SQL) subject Category:SQL_keywords.
- Update_(SQL) type Redirect.
- Update_(SQL) comment "An SQL UPDATE statement changes the data of one or more records in a table.".
- Update_(SQL) label "Update (SQL)".
- Update_(SQL) sameAs Q1076005.
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs UPDATE.
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs UPDATE_(SQL).
- Update_(SQL) sameAs Мәліметтерді_түзету,_жаңарту.
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs m.04jl6r.
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs Update_(SQL).
- Update_(SQL) sameAs Q1076005.
- Update_(SQL) sameAs Update.
- Update_(SQL) wasDerivedFrom Update_(SQL)?oldid=645787532.
- Update_(SQL) isPrimaryTopicOf Update_(SQL).