- Mssql Insert Return Generated Keys 2017
- Mssql Insert Return Generated Keys 2016
- Mssql Insert Return Generated Keys In Java
Apr 06, 2017 If multiple values are inserted with Statement.RETURNGENERATEDKEYS set, driver returns only the last generated key/identity value on calling getGeneratedKeys.But according to JDBC spec, The ResultSet object returned by getGeneratedKeys will contain a row for each value that a statement generated. If you specify an ON DUPLICATE KEY UPDATE clause and a row to be inserted would cause a duplicate value in a UNIQUE index or PRIMARY KEY, an UPDATE of the old row occurs. For example, if column a is declared as UNIQUE and contains the value 1, the following two statements have similar effect:. INSERT INTO t1 (a,b,c) VALUES (1,2,3) ON DUPLICATE KEY UPDATE c=c+1; UPDATE t1 SET c=c+1 WHERE a=1. Description: When I insert with a PreparedStatement or Statement and I read the generated key by the mysql database, I have a SQLException Generated keys not requested, but I have specified the Statement.RETURNGENERATEDKEYS parameter. I have tested with connector/J 5.1.23 and 5.1.30 and Fedora Linux 64 bits and Windows Server 2012 64 bits.
-->If this function existed, then the stored procedure could return the newly created record ID, and work correctly with the RETURNGENERATEDKEYS call. 22 Nov 2005 15:22 Mark Matthews No, it is not possible, as the JDBC driver has no 'insight' into what functions exist, and functions can only return result sets or output parameters. Step 3: Proof of concept connecting to SQL using Java.; 2 minutes to read +1; In this article. This example should be considered a proof of concept only. The sample code is simplified for clarity, and doesn't necessarily represent best practices recommended by Microsoft. Step 1: Connect. Use the connection class to connect to SQL.
Is a system function that returns the last-inserted identity value.
Syntax
Return Types
numeric(38,0)
Remarks
After an INSERT, SELECT INTO, or bulk copy statement is completed, @@IDENTITY contains the last identity value that is generated by the statement. If the statement did not affect any tables with identity columns, @@IDENTITY returns NULL. If multiple rows are inserted, generating multiple identity values, @@IDENTITY returns the last identity value generated. If the statement fires one or more triggers that perform inserts that generate identity values, calling @@IDENTITY immediately after the statement returns the last identity value generated by the triggers. If a trigger is fired after an insert action on a table that has an identity column, and the trigger inserts into another table that does not have an identity column, @@IDENTITY returns the identity value of the first insert. The @@IDENTITY value does not revert to a previous setting if the INSERT or SELECT INTO statement or bulk copy fails, or if the transaction is rolled back.
Failed statements and transactions can change the current identity for a table and create gaps in the identity column values. The identity value is never rolled back even though the transaction that tried to insert the value into the table is not committed. For example, if an INSERT statement fails because of an IGNORE_DUP_KEY violation, the current identity value for the table is still incremented.
@@IDENTITY, SCOPE_IDENTITY, and IDENT_CURRENT are similar functions because they all return the last value inserted into the IDENTITY column of a table.
Mssql Insert Return Generated Keys 2017
@@IDENTITY and SCOPE_IDENTITY return the last identity value generated in any table in the current session. However, SCOPE_IDENTITY returns the value only within the current scope; @@IDENTITY is not limited to a specific scope.
IDENT_CURRENT is not limited by scope and session; it is limited to a specified table. IDENT_CURRENT returns the identity value generated for a specific table in any session and any scope. For more information, see IDENT_CURRENT (Transact-SQL).
The scope of the @@IDENTITY function is current session on the local server on which it is executed. This function cannot be applied to remote or linked servers. To obtain an identity value on a different server, execute a stored procedure on that remote or linked server and have that stored procedure (which is executing in the context of the remote or linked server) gather the identity value and return it to the calling connection on the local server.
Replication may affect the @@IDENTITY value, since it is used within the replication triggers and stored procedures. @@IDENTITY is not a reliable indicator of the most recent user-created identity if the column is part of a replication article. You can use the SCOPE_IDENTITY() function syntax instead of @@IDENTITY. For more information, see SCOPE_IDENTITY (Transact-SQL)
Mssql Insert Return Generated Keys 2016
Note
The calling stored procedure or Transact-SQL statement must be rewritten to use the SCOPE_IDENTITY() function, which returns the latest identity used within the scope of that user statement, and not the identity within the scope of the nested trigger used by replication.
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Examples
The following example inserts a row into a table with an identity column (LocationID) and uses @@IDENTITY to display the identity value used in the new row.
See Also
Mssql Insert Return Generated Keys In Java
System Functions (Transact-SQL)
CREATE TABLE (Transact-SQL)
IDENT_CURRENT (Transact-SQL)
INSERT (Transact-SQL)
SCOPE_IDENTITY (Transact-SQL)
SELECT (Transact-SQL)
