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Insert From Select

Oracle Usage

You can insert multiple records into a table from another table using the INSERT FROM SELECT statement, which is a derivative of the basic INSERT statement. The column ordering and data types must match between the target and the source tables.

Examples

Simple INSERT FROM SELECT (explicit).

INSERT INTO EMPS (EMPLOYEE_ID, FIRST_NAME, SALARY, DEPARTMENT_ID) SELECT EMPLOYEE_ID,
FIRST_NAME, SALARY, DEPARTMENT_ID
FROM EMPLOYEES
WHERE SALARY > 10000;

Simple INSERT FROM SELECT (implicit).

INSERT INTO EMPS
SELECT EMPLOYEE_ID, FIRST_NAME, SALARY, DEPARTMENT_ID
FROM EMPLOYEES
WHERE SALARY > 10000;

This example produces the same result as the preceding example but uses a subquery in the DML_table_expression_clause.

INSERT INTO
(SELECT EMPLOYEE_ID, FIRST_NAME, SALARY, DEPARTMENT_ID FROM EMPS)
VALUES (120, 'Kenny', 10000, 90);

Log errors with the Oracle error_logging_clause.

ALTER TABLE EMPS ADD CONSTRAINT PK_EMP_ID PRIMARY KEY(employee_id);
EXECUTE DBMS_ERRLOG.CREATE_ERROR_LOG('EMPS', 'ERRLOG');
INSERT INTO EMPS
SELECT EMPLOYEE_ID, FIRST_NAME, SALARY, DEPARTMENT_ID
FROM EMPLOYEES
WHERE SALARY > 10000
LOG ERRORS INTO errlog ('Cannot Perform Insert') REJECT LIMIT 100;
0 rows inserted

When inserting an existing EMPLOYEE ID into the EMPS table, the insert doesn’t fail because the invalid records are redirected to the ERRLOG table.

For more information, see INSERT in the Oracle documentation.

MySQL Usage

MySQL is compatible with the Oracle INSERT FROM SELECT syntax except for a few features specific to Oracle. For example, the conditional_insert_clause (ALL | FIRST | ELSE). MySQL doesn’t support the Oracle error_logging_clause feature. Generally, you can use ON DUPLICATE KEY UPDATE to handle duplicate rows.

Syntax

INSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE]
  [INTO] tbl_name
  [PARTITION (partition_name [, partition_name] ...)]
  [(col_name [, col_name] ...)]
  SELECT ...
  [ON DUPLICATE KEY UPDATE assignment_list]

value:
  {expr | DEFAULT}

assignment:
  col_name = value

assignment_list:
  assignment [, assignment] ...

Examples

Simple INSERT FROM SELECT (explicit).

INSERT INTO EMPS (EMPLOYEE_ID, FIRST_NAME, SALARY, DEPARTMENT_ID)
SELECT EMPLOYEE_ID, FIRST_NAME, SALARY, DEPARTMENT_ID
FROM EMPLOYEES
WHERE SALARY > 10000;

Simple INSERT FROM SELECT (implicit).

INSERT INTO EMPS
SELECT EMPLOYEE_ID, FIRST_NAME, SALARY, DEPARTMENT_ID
FROM EMPLOYEES
WHERE SALARY > 10000;

The following example isn’t compatible with MySQL.

INSERT INTO
(SELECT EMPLOYEE_ID, FIRST_NAME, SALARY, DEPARTMENT_ID FROM EMPS)
VALUES (120, 'Kenny', 10000, 90);

The following example demonstrates using the ON DUPLICATE KEY UPDATE clause to update specific columns when a UNIQUE violation occurs.

INSERT INTO EMPS
SELECT * from EMPLOYEES
  where EMPLOYEE_ID > 10
ON DUPLICATE KEY UPDATE
EMPS.FIRST_NAME=EMPLOYEES.FIRST_NAME,
EMPS.SALARY=EMPLOYEES.SALARY;

For more information, see INSERT …​ SELECT Statement in the MySQL documentation.