UPDATE (Transact- SQL) | Microsoft Docs. THIS TOPIC APPLIES TO: SQL Server (starting with 2. Azure SQL Database.
Azure SQL Data Warehouse Parallel Data Warehouse Changes existing data in a table or view in SQL Server 2. For examples, see Examples. Transact- SQL Syntax Conventions. Syntax- - Syntax for SQL Server and Azure SQL Database. WITH < common_table_expression> [.. TOP ( expression ) [ PERCENT ] ]. WITH ( < Table_Hint_Limited> [ ..
DEFAULT | NULL }. WRITE ( expression , @Offset , @Length ) }. OUTPUT Clause> ]. FROM{ < table_source> } [ .. WHERE { < search_condition>. CURRENT OF. { { [ GLOBAL ] cursor_name }. OPTION ( < query_hint> [ ..
Syntax for Azure SQL Data Warehouse and Parallel Data Warehouse. UPDATE [ database_name . SET { column_name = { expression | NULL } } [ ..
FROM from_clause ]. WHERE < search_condition> ]. OPTION ( LABEL = label_name ) ].
Arguments WITH < common_table_expression> Specifies the temporary named result set or view, also known as common table expression (CTE), defined within the scope of the UPDATE statement. The CTE result set is derived from a simple query and is referenced by UPDATE statement. Common table expressions can also be used with the SELECT, INSERT, DELETE, and CREATE VIEW statements. For more information, see WITH common_table_expression (Transact- SQL).
TOP (expression) [ PERCENT ]Specifies the number or percent of rows that are updated. The rows referenced in the TOP expression used with INSERT, UPDATE, or DELETE are not arranged in any order. Parentheses delimiting expression in TOP are required in INSERT, UPDATE, and DELETE statements. For more information, see TOP (Transact- SQL). The alias specified in the FROM clause representing the table or view from which the rows are to be updated.
SQL Aliases. SQL aliases are used to give a table, or a column in a table, a temporary name. Aliases are often used to make column names more readable. SQL (Structured Query Language) is a computer language aimed to store, manipulate, and query data stored in relational databases. The first incarnation of SQL. THIS TOPIC APPLIES TO: SQL Server (starting with 2008) Azure SQL Database Azure SQL Data Warehouse Parallel Data Warehouse. Changes existing data in a table or view. I have a very basic UPDATE SQL - UPDATE HOLD_TABLE Q SET Q.TITLE = 'TEST' WHERE Q.ID = 101; This query runs fine in Oracle, Derby, My-Sql - but it fails in SQL server.
Is the name of the server (using a linked server name or the OPENDATASOURCE function as the server name) on which the table or view is located. If server_name is specified, database_name and schema_name are required. Is the name of the database. Is the name of the schema to which the table or view belongs.
Is the name of the table or view from which the rows are to be updated. The view referenced by table_or_view_name must be updatable and reference exactly one base table in the FROM clause of the view. For more information about updatable views, see CREATE VIEW (Transact- SQL). Is either the OPENQUERY or OPENROWSET function, subject to provider capabilities. WITH ( < Table_Hint_Limited> )Specifies one or more table hints that are allowed for a target table. The WITH keyword and the parentheses are required. NOLOCK and READUNCOMMITTED are not allowed.
For information about table hints, see Table Hints (Transact- SQL). Specifies a table variable as a table source. SETSpecifies the list of column or variable names to be updated.
Is a column that contains the data to be changed. Identity columns cannot be updated.
Is a variable, literal value, expression, or a subselect statement (enclosed with parentheses) that returns a single value. The value returned by expression replaces the existing value in column_name or @variable. Note When referencing the Unicode character data types nchar, nvarchar, and ntext, 'expression' should be prefixed with the capital letter 'N'. If 'N' is not specified, SQL Server converts the string to the code page that corresponds to the default collation of the database or column. Any characters not found in this code page are lost.
DEFAULTSpecifies that the default value defined for the column is to replace the existing value in the column. This can also be used to change the column to NULL if the column has no default and is defined to allow null values. Compound assignment operator: += Add and assign- = Subtract and assign*= Multiply and assign/= Divide and assign%= Modulo and assign& = Bitwise AND and assign^= Bitwise XOR and assign|= Bitwise OR and assign udt_column_name. Is a user- defined type column.
Is a public property or public data member of a user- defined type. Is a nonstatic public mutator method of udt_column_name that takes one or more arguments. WRITE (expression,@Offset,@Length)Specifies that a section of the value of column_name is to be modified. Length units starting from @Offset of column_name. Only columns of varchar(max), nvarchar(max), or varbinary(max) can be specified with this clause.
NULL and cannot be qualified with a table name or table alias. If expression is set to NULL, @Length is ignored, and the value in column_name is truncated at the specified @Offset. Offset is the starting point in the value of column_name at which expression is written.
Offset is a zero- based ordinal position, is bigint, and cannot be a negative number. If @Offset is NULL, the update operation appends expression at the end of the existing column_name value and @Length is ignored. If @Offset is greater than the length of the column_name value, the Database Engine returns an error. If @Offset plus @Length exceeds the end of the underlying value in the column, the deletion occurs up to the last character of the value.
If @Offset plus LEN(expression) is greater than the underlying declared size, an error is raised. Length is the length of the section in the column, starting from @Offset, that is replaced by expression.
Length is bigint and cannot be a negative number. If @Length is NULL, the update operation removes all data from @Offset to the end of the column_name value. For more information, see Remarks.
Is a declared variable that is set to the value returned by expression. SET @variable = column = expression sets the variable to the same value as the column. This differs from SET @variable = column, column = expression, which sets the variable to the pre- update value of the column. OUTPUT_Clause> Returns updated data or expressions based on it as part of the UPDATE operation. The OUTPUT clause is not supported in any DML statements that target remote tables or views. For more information, see OUTPUT Clause (Transact- SQL).
FROM < table_source> Specifies that a table, view, or derived table source is used to provide the criteria for the update operation. For more information, see FROM (Transact- SQL).
If the object being updated is the same as the object in the FROM clause and there is only one reference to the object in the FROM clause, an object alias may or may not be specified. If the object being updated appears more than one time in the FROM clause, one, and only one, reference to the object must not specify a table alias. All other references to the object in the FROM clause must include an object alias.
A view with an INSTEAD OF UPDATE trigger cannot be a target of an UPDATE with a FROM clause. Note Any call to OPENDATASOURCE, OPENQUERY, or OPENROWSET in the FROM clause is evaluated separately and independently from any call to these functions used as the target of the update, even if identical arguments are supplied to the two calls. In particular, filter or join conditions applied on the result of one of those calls have no effect on the results of the other. WHERESpecifies the conditions that limit the rows that are updated. There are two forms of update based on which form of the WHERE clause is used: Searched updates specify a search condition to qualify the rows to delete.
Positioned updates use the CURRENT OF clause to specify a cursor. The update operation occurs at the current position of the cursor.
Specifies the condition to be met for the rows to be updated. The search condition can also be the condition upon which a join is based. There is no limit to the number of predicates that can be included in a search condition. For more information about predicates and search conditions, see Search Condition (Transact- SQL). CURRENT OFSpecifies that the update is performed at the current position of the specified cursor.
A positioned update using a WHERE CURRENT OF clause updates the single row at the current position of the cursor. This can be more accurate than a searched update that uses a WHERE < search_condition> clause to qualify the rows to be updated. A searched update modifies multiple rows when the search condition does not uniquely identify a single row. GLOBALSpecifies that cursor_name refers to a global cursor. Is the name of the open cursor from which the fetch should be made.