如何在 SQL 日期类型列中插入日期？

Question

I have a table with date type column.

I am trying to insert date in it:

But I get an error:

Please give me to make the correct query to put the date

Answer 1

轻松修复::

INSERT INTO t(dob) VALUES(DATE '2015-12-17');

Answer 2

Assuming this is an Oracle question based on the ORA-01843 error message , the problem appears to be in the date formatting as the error suggests.

In the provided example does the date '6-3-2012' mean '3 March 2012' or 'June 6, 2012?' The answer lies within the NLS_DATE_FORMAT parameter.

Out of the box, the Oracle date format is DD-MON-RR. So your corrected date format is either '03-MAR-12' or '06-JUN-12.' If the NLS_DATE_FORMAT has not been changed.

Answer 3

Never try to insert a string into a date column! If you have a string, use the to_date function with an explicit date format (and use 4 digit dates).

Relying on nls_date_format to implicitly convert your strings is just asking for trouble (like you just did), it can very easily change, even some apps will change it themselves.

The date literal ( date '2015-12-17' https://docs.oracle.com/cd/B19306_01/server.102/b14200/sql_elements003.htm#BABGIGCJ ) always uses the same date format so that might be okay for ad hoc statements but you need to be aware that it is literal by name and literal by nature. They don't support bind variables so you will end up writing unshareable SQL to chew up your shared pool.