Insert random data in Oracle table

6
votes

I wan to create random data in Oracle table:

CREATE TABLE EVENTS(
  EVENTID INTEGER NOT NULL,
  SOURCE VARCHAR2(50 ),
  TYPE VARCHAR2(50 ),
  EVENT_DATE DATE,
  DESCRIPTION VARCHAR2(100 )
)
/

I tried this:

BEGIN  
FOR loop_counter IN 1..1000 
LOOP 
INSERT INTO EVENTS (EVENTID, SOURCE, TYPE, EVENT_DATE, DESCRIPTION) VALUES (loop_counter, loop_counter, 'warning', 
DBMS_RANDOM.VALUE(TO_CHAR(DATE '2000-01-01','J') ,TO_CHAR(DATE '9999-12-31','J')), dbms_random.value(1,100)); 
END LOOP; 
COMMIT; 
END;

I get this error exception

Error report - ORA-06550: line 5, column 13: PL/SQL: ORA-00932: inconsistent datatypes: expected DATE got NUMBER ORA-06550: line 4, column 1: PL/SQL: SQL Statement ignored 06550. 00000 - "line %s, column %s:\n%s" *Cause: Usually a PL/SQL compilation error. *Action:

Can you give me advice how I can fix this issue?

3
sqloracleplsqloracle11g
Yes, I updated the post. - Peter Penzov
That dbms_random() call will also not return a date, so it will fail if you try to insert a number like 3684482.0997 into a DATE column - a_horse_with_no_name
How I have to update it? - Peter Penzov

3 Answers

14
votes

Use:

BEGIN  
FOR loop_counter IN 1..1000 LOOP 
INSERT INTO "EVENTS" (EVENTID, "SOURCE", TYPE, EVENT_DATE, DESCRIPTION) 
VALUES (loop_counter, loop_counter, 'warning', 
        TO_DATE(TRUNC(DBMS_RANDOM.VALUE(TO_CHAR(DATE '2000-01-01','J') ,TO_CHAR(DATE '9999-12-31','J'))),'J')
        ,dbms_random.value(1,100)
       ); 
END LOOP; 
COMMIT; 
END;

SqlFiddleDemo

Changes:

  1. Add mising ; after final END
  2. Quote keywords
  3. Rewrite random date generation
3
votes

Also, if you use PL/SQL Developer by Allroundautomations, you can find out good tool for this job: Data Generator. It can be very useful, because it can help to generate some data in any types and place it to a tables.

(see screenshot attached) enter image description here

3
votes
INSERT INTO EVENTS (EVENTID, "SOURCE", TYPE, EVENT_DATE, DESCRIPTION)
SELECT level, level, 'warning', 
        TO_DATE(TRUNC(DBMS_RANDOM.VALUE(TO_CHAR(DATE '2000-01-01','J') ,TO_CHAR(DATE '9999-12-31','J'))),'J')
        ,dbms_random.value(1,100)
  FROM DUAL
CONNECT BY LEVEL <= 1000;