Dieser Artikel listet das SQL UPDATE auf Syntax, wie sie von verschiedenen Datenbankverwaltungssystemen (DBMSs) implementiert wird. Die Syntax wird genau so aufgeführt, wie sie jeder Anbieter auf seiner Website aufgeführt hat. Klicken Sie auf den entsprechenden Link, um weitere Einzelheiten zur Syntax für einen bestimmten Anbieter anzuzeigen.
Die behandelten DBMS sind MySQL, SQL Server, PostgreSQL und Oracle Database.
MySQL
Aus dem MySQL 5.7 Referenzhandbuch.
Syntax für einzelne Tabellen:
UPDATE [LOW_PRIORITY] [IGNORE]table_referenceSETcol_name1={expr1|DEFAULT} [,col_name2={expr2|DEFAULT}] ... [WHEREwhere_condition] [ORDER BY ...] [LIMITrow_count]
Syntax für mehrere Tabellen:
UPDATE [LOW_PRIORITY] [IGNORE]table_referencesSETcol_name1={expr1|DEFAULT} [,col_name2={expr2|DEFAULT}] ... [WHEREwhere_condition]
SQL-Server
Aus der Transact-SQL-Referenz:
[ WITH <common_table_expression> [...n] ]
UPDATE
[ TOP ( expression ) [ PERCENT ] ]
{ { table_alias | <object> | rowset_function_limited
[ WITH ( <Table_Hint_Limited> [ ...n ] ) ]
}
| @table_variable
}
SET
{ column_name = { expression | DEFAULT | NULL }
| { udt_column_name.{ { property_name = expression
| field_name = expression }
| method_name ( argument [ ,...n ] )
}
}
| column_name { .WRITE ( expression , @Offset , @Length ) }
| @variable = expression
| @variable = column = expression
| column_name { += | -= | *= | /= | %= | &= | ^= | |= } expression
| @variable { += | -= | *= | /= | %= | &= | ^= | |= } expression
| @variable = column { += | -= | *= | /= | %= | &= | ^= | |= } expression
} [ ,...n ]
[ <OUTPUT Clause> ]
[ FROM{ <table_source> } [ ,...n ] ]
[ WHERE { <search_condition>
| { [ CURRENT OF
{ { [ GLOBAL ] cursor_name }
| cursor_variable_name
}
]
}
}
]
[ OPTION ( <query_hint> [ ,...n ] ) ]
[ ; ]
<object> ::=
{
[ server_name . database_name . schema_name .
| database_name .[ schema_name ] .
| schema_name .
]
table_or_view_name} PostgreSQL
Aus dem PostgreSQL 9.5-Handbuch:
[ WITH [ RECURSIVE ] with_query [, ...] ]
UPDATE [ ONLY ] table_name [ * ] [ [ AS ] alias ]
SET { column_name = { expression | DEFAULT } |
( column_name [, ...] ) = ( { expression | DEFAULT } [, ...] ) |
( column_name [, ...] ) = ( sub-SELECT )
} [, ...]
[ FROM from_list ]
[ WHERE condition | WHERE CURRENT OF cursor_name ]
[ RETURNING * | output_expression [ [ AS ] output_name ] [, ...] ] Oracle-Datenbank
Aus der Oracle Database Online Documentation 12c Version 1 (12.1):
UPDATE [ hint ]
{ dml_table_expression_clause
| ONLY (dml_table_expression_clause)
} [ t_alias ]
update_set_clause
[ where_clause ]
[ returning_clause ]
[error_logging_clause] ; DML_table_expression_clause::=
{ [ schema. ]
{ table
[ partition_extension_clause
| @ dblink
]
| { view | materialized view } [ @ dblink ]
}
| ( subquery [ subquery_restriction_clause ] )
| table_collection_expression
} partition_extension_clause::=
{ PARTITION (partition)
| PARTITION FOR (partition_key_value [, partition_key_value]...)
| SUBPARTITION (subpartition)
| SUBPARTITION FOR (subpartition_key_value [, subpartition_key_value]...)
} subquery_restriction_clause ::=
WITH { READ ONLY
| CHECK OPTION
} [ CONSTRAINT constraint ] table_collection_expression ::=
TABLE (collection_expression) [ (+) ]
update_set_clause ::=
SET
{ { (column [, column ]...) = (subquery)
| column = { expr | (subquery) | DEFAULT }
}
[, { (column [, column]...) = (subquery)
| column = { expr | (subquery) | DEFAULT }
}
]...
| VALUE (t_alias) = { expr | (subquery) }
} where_clause ::=
WHERE condition
returning_clause::=
{ RETURN | RETURNING } expr [, expr ]...
INTO data_item [, data_item ]... error_logging_clause::=
LOG ERRORS
[ INTO [schema.] table ]
[ (simple_expression) ]
[ REJECT LIMIT { integer | UNLIMITED } ] Über das UPDATE Erklärung
Das UPDATE -Anweisung ändert die Werte der angegebenen Spalten in allen Zeilen, die die Bedingung erfüllen. Nur die zu ändernden Spalten müssen im SET enthalten sein Klausel; Spalten, die nicht explizit geändert wurden, behalten ihre vorherigen Werte.
