指定有效数字 SQL 错误：ORA-01722：无效数字

Question

Please I need help in fixing the error message I have been getting when I try to INSERT a content to the table below. An example will help me understand it better.

CREATE TABLE EMP (
        EMP_ID      INTEGER     NOT NULL
    , FNAME     VARCHAR(30) NOT NULL
    , LNAME     VARCHAR(30)     NOT NULL
    , ADDRESS   VARCHAR(50)     NOT NULL
    , SALARY    VARCHAR(50)     NOT NULL
    , DOB       DATE            NOT NULL
    , SHIFTS    VARCHAR2(20)    NOT NULL
    , SSN       CHAR(11)        NOT NULL
    , PHONE         CHAR(12)    NOT NULL
    , HIRING_DATE   CHAR(12)    NOT NULL
    , EMAIL     VARCHAR2(50)    NOT NULL
);

Insert:

INSERT INTO EMP
VALUES(1,'Erica', 'Brandon', '425 Main Street', 'Credit Card', 
       '1965-06-30', 'Evening', '610-24-1111',
       '603-547-8296', '2010-01-16', 'ejohnson@fakemail.com');

Error report - SQL Error: ORA-01722: invalid number 01722. 00000 - "invalid number" *Cause: The specified number was invalid. *Action: Specify a valid number.

Answer 1

Use TO_DATE :

INSERT INTO EMP 
VALUES(1,
       'Erica',
       'Brandon',
       '425 Main Street',
       'Credit Card',
       TO_DATE('1965-06-30', 'yyyy-mm-dd'),
       'Evening',
       '610-24-1111',
       '603-547-8296',
       TO_DATE('2010-01-16', 'yyyy-mm-dd'),
       'ejohnson@fakemail.com');

SqlFiddleDemo

It is a good practice to enlist column names like:

INSERT INTO EMP(EMP_ID,FNAME,LNAME...)
VALUES (...);

You should store HIRING_DATE as DATE not string.

Answer 2

The date format in Oracle depends on the internationalization settings (and the default is not good). You can use the date keyword to specify dates using ISO standard formats:

INSERT INTO EMP
    VALUES(1, 'Erica', 'Brandon', '425 Main Street', 'Credit Card', 
           DATE '1965-06-30', 'Evening', '610-24-1111',
           '603-547-8296', '2010-01-16', 'ejohnson@fakemail.com');

Notes:

• HiringDate should be a date type, not a character type.
• You should list the columns in EMP in the insert .