将nodejs中的日期格式转换插入Oracle时间戳

Question

 let date = moment(new Date()).format("YYYY-MM-DD hh:mm:ss.000000000 A");

// when i tried to insert date in table it is null

// TImestamp format in OracleDB is 14-03-22 3:53:08.901008000 PM

INSERT INTO STUDENT VALUES(join_date) ( '14-03-22 3:53:08.901008000 PM')

Answer 1

How can get date format like YYYY-MM-DD HH:MM:SS.FF3 AM/PM because in oracle it supports this kind of timestamp

In Oracle, a TIMESTAMP is a binary data type that consists of 7 - 13 bytes (century, year-of-century, month, day, hour, minute, second and between zero and six bytes for fractional seconds). It ALWAYS contains those components and it is NEVER stored in a particular format.

The client application you are using (ie SQL/Plus, SQL Developer, NodeJS, Java, etc.) may chose to DISPLAY the binary value with a default format but this is a function of the client application and NOT a function of the database. (Some client applications may use the NLS_TIMESTAMP_FORMAT session parameter from the database as their default format model but the implicit conversion from binary-to-string for display purposes is still something that the client application does, not the database, and not all clients use the database session variables for their defaults.)

You should either:

1. Use a timestamp literal:

    INSERT INTO STUDENT (join_date) VALUES (TIMESTAMP '2022-03-14 15:53:08.901008000');

2. Explicitly convert your formatted string to a timestamp binary data type using the TO_TIMESTAMP function with a format model:

    INSERT INTO STUDENT (join_date) VALUES ( TO_TIMESTAMP('14-03-22 3:53:08.901008000 PM', 'DD-MM-RR HH12:MI:SS.FF9 AM') )