DBMS_SQL.EXECUTE an update statement : DBMS_SQL « System Packages « Oracle PL/SQL Tutorial






SQL>
SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
  2                    ENAME VARCHAR2(10),
  3                    JOB VARCHAR2(9),
  4                    MGR NUMBER(4),
  5                    HIREDATE DATE,
  6                    SAL NUMBER(7, 2),
  7                    COMM NUMBER(7, 2),
  8                    DEPTNO NUMBER(2));

Table created.

SQL>
SQL>
SQL> INSERT INTO EMP VALUES (7369, 'SMITH', 'CLERK',    7902, TO_DATE('17-DEC-1980', 'DD-MON-YYYY'), 800, NULL, 20);

1 row created.

SQL> INSERT INTO EMP VALUES (7499, 'ALLEN', 'SALESMAN', 7698, TO_DATE('20-FEB-1981', 'DD-MON-YYYY'), 1600, 300, 30);

1 row created.

SQL> INSERT INTO EMP VALUES (7521, 'WARD',  'SALESMAN', 7698, TO_DATE('22-FEB-1981', 'DD-MON-YYYY'), 1250, 500, 30);

1 row created.

SQL> INSERT INTO EMP VALUES (7566, 'JONES', 'MANAGER',  7839, TO_DATE('2-APR-1981',  'DD-MON-YYYY'), 2975, NULL, 20);

1 row created.

SQL> INSERT INTO EMP VALUES (7654, 'MARTIN', 'SALESMAN', 7698,TO_DATE('28-SEP-1981', 'DD-MON-YYYY'), 1250, 1400, 30);

1 row created.

SQL> INSERT INTO EMP VALUES (7698, 'BLAKE', 'MANAGER', 7839,TO_DATE('1-MAY-1981', 'DD-MON-YYYY'), 2850, NULL, 30);

1 row created.

SQL> INSERT INTO EMP VALUES (7782, 'CLARK', 'MANAGER', 7839,TO_DATE('9-JUN-1981', 'DD-MON-YYYY'), 2450, NULL, 10);

1 row created.

SQL> INSERT INTO EMP VALUES (7788, 'SCOTT', 'ANALYST', 7566,TO_DATE('09-DEC-1982', 'DD-MON-YYYY'), 3000, NULL, 20);

1 row created.

SQL> INSERT INTO EMP VALUES (7839, 'KING', 'PRESIDENT', NULL,TO_DATE('17-NOV-1981', 'DD-MON-YYYY'), 5000, NULL, 10);

1 row created.

SQL> INSERT INTO EMP VALUES (7844, 'TURNER', 'SALESMAN', 7698,TO_DATE('8-SEP-1981', 'DD-MON-YYYY'), 1500, 0, 30);

1 row created.

SQL> INSERT INTO EMP VALUES (7876, 'ADAMS', 'CLERK', 7788,TO_DATE('12-JAN-1983', 'DD-MON-YYYY'), 1100, NULL, 20);

1 row created.

SQL> INSERT INTO EMP VALUES (7900, 'JAMES', 'CLERK', 7698,TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 950, NULL, 30);

1 row created.

SQL> INSERT INTO EMP VALUES (7902, 'FORD', 'ANALYST', 7566,TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 3000, NULL, 20);

1 row created.

SQL> INSERT INTO EMP VALUES (7934, 'MILLER', 'CLERK', 7782,TO_DATE('23-JAN-1982', 'DD-MON-YYYY'), 1300, NULL, 10);

1 row created.

SQL>
SQL>
SQL> CREATE OR REPLACE PROCEDURE updnumval
  2     (col_in IN VARCHAR2,
  3      start_in IN DATE,
  4      end_in IN DATE,
  5      val_in IN NUMBER)
  6  IS
  7     cur PLS_INTEGER := DBMS_SQL.OPEN_CURSOR;
  8     returnValue PLS_INTEGER;
  9  BEGIN
 10     DBMS_SQL.PARSE (cur,
 11        'UPDATE emp SET ' || col_in || ' = ' || val_in ||
 12        ' WHERE hiredate BETWEEN ' ||
 13        ' TO_DATE (''' || TO_CHAR (start_in)  || ''')' ||
 14        ' AND ' ||
 15        ' TO_DATE (''' || TO_CHAR (end_in)  || ''')' ,
 16        DBMS_SQL.NATIVE);
 17
 18     returnValue := DBMS_SQL.EXECUTE (cur);
 19
 20     DBMS_OUTPUT.PUT_LINE ('Rows updated: ' || TO_CHAR (returnValue));
 21
 22     DBMS_SQL.CLOSE_CURSOR (cur);
 23  END;
 24  /

Procedure created.

SQL> drop table emp;

Table dropped.








31.26.DBMS_SQL
31.26.1.dbms_sql.number_table
31.26.2.Close a cursor
31.26.3.Assign date with DBMS_SQL package
31.26.4.Create Pl/SQL block dynamically and then execute it by calling 'DBMS_SQL.EXECUTE'
31.26.5.DBMS_SQL.PARSE
31.26.6.An example of using DBMS_SQL.OPEN_CURSOR
31.26.7.Package for running dynamic sql based on DBMS_SQL package
31.26.8.Wrap dbms_sql package
31.26.9.Dump Column long with DBMS_SQL.DEFINE_COLUMN_LONG
31.26.10.DBMS_SQL.BIND_VARIABLE and DBMS_SQL.EXECUTE
31.26.11.DBMS_SQL.EXECUTE an update statement
31.26.12.Use DBMS_SQL to update a table and get the number of rows updated
31.26.13.DBMS_SQL.VARCHAR2_TABLE and DBMS_SQL.NUMBER_TABLE
31.26.14.Use dynamic SQL to check the business logic
31.26.15.Use DBMS_SQL package to parse math expression
31.26.16.Use a character string of arithmetic logic, selecting against the DUAL table to return a number value.
31.26.17.DBMS_SQL.LAST_ERROR_POSITION
31.26.18.Dump query with dbms_sql
31.26.19.Use dbms_sql.describe_columns
31.26.20.Print table with dynamic query