SQL DML: Incorrect date value (MySQL)

Question

I created a table in my database:

CREATE TABLE official_receipt(
    student_no INT UNSIGNED,
    academic_year CHAR(8),
    trimester ENUM('1', '2', '3'),
    or_no MEDIUMINT UNSIGNED,
    issue_date DATE NOT NULL,
    received_from VARCHAR(255) NOT NULL,
    amount_of DECIMAL(8,2) NOT NULL,
    issued_by VARCHAR(255),
    doc_type ENUM('FULL', 'DOWN', 'INST') NOT NULL,
    form_of_payment ENUM('CASH', 'INST') NOT NULL,
    PRIMARY KEY (student_no, academic_year, trimester, or_no)
);

I inserted some values:

INSERT INTO official_receipt(student_no , academic_year, trimester, or_no, issue_date, received_from, amount_of, issued_by, doc_type, form_of_payment)
VALUES
    (201201121, 'AY201314', '1', 029940, 2013-05-21, 'NAME', 20000.00, NULL, 'DOWN', 'INST'),
    (201201121, 'AY201314', '1', 029944, 2013-07-23, 'NAME', 8000.00, NULL, 'INST', 'INST'),
    (201201101, 'AY201314', '1', 029941, 2013-05-21, 'NAME', 56650.00, NULL, 'FULL', 'CASH'),
    (201201037, 'AY201314', '1', 029942, 2013-05-21, 'NAME', 56650.00, NULL, 'FULL', 'CASH'),
    (201201142, 'AY201314', '1', 029943, 2013-05-21, 'NAME', 63800.00, NULL, 'FULL', 'CASH');

I am getting this error:

Error Code: 1292. Incorrect date value: '1987' for column 'issue_date' at row 1

I am quite stumped because I already followed the YYYY-MM-DD format. Any help?

Answer 1

As documented under Date and Time Literals:

MySQL recognizes DATE values in these formats:

• As a string in either 'YYYY-MM-DD' or 'YY-MM-DD' format. A “relaxed” syntax is permitted: Any punctuation character may be used as the delimiter between date parts. For example, '2012-12-31', '2012/12/31', '2012^12^31', and '2012@12@31' are equivalent.

• As a string with no delimiters in either 'YYYYMMDD' or 'YYMMDD' format, provided that the string makes sense as a date. For example, '20070523' and '070523' are interpreted as '2007-05-23', but '071332' is illegal (it has nonsensical month and day parts) and becomes '0000-00-00'.

• As a number in either YYYYMMDD or YYMMDD format, provided that the number makes sense as a date. For example, 19830905 and 830905 are interpreted as '1983-09-05'.

Therefore, the expression 2013-05-21 is not a valid MySQL date literal (it is in fact an arithmetic expression, consisting of two subtractions: it results in the integer 1987). In order to comply with one of the literal formats detailed above, you must either quote your date literal as a string and/or remove the delimiters.