问题
I've already exported data from an Oracle 11g instance as insert statements. They need to go into a MySQL 5.5 instance. Having trouble with the TIMESTAMP conversion; I know I can use the TO_TIMESTAMP function inline with INSERT statements in MySQL; however, am unsure as to the correct flags to use. As follows below, in linear order, is: the Oracle timestamp statement and my attempt at a MySQL compatible statement. Obviously it's not working (in that MySQL states there's a syntax error).
Oracle:
TO_TIMESTAMP('12/22/2015 5:08:59.245837 PM','fmMMfm/fmDDfm/YYYY fmHH12fm:MI:SS.FF AM')
MySQL:
TO_TIMESTAMP('12/22/2015 5:08:59.245837 PM','%m/%d/%Y %h:%i:%s')
What am I missing beyond flags for microseconds and AM/PM?
回答1:
assumed you export from SQL Developer.
before you export the whole data, change your datetime select query with :
TO_CHAR(COLUMN_NAME, 'YYYY-MM-DD HH24:MI:SS') as XXX
it will produce datetime with MySQL format. so when you get the insert query, you can run directly at MySQL
回答2:
FOR MYSQL: STR_TO_DATE('2/6/2015 5:20:43.000000 AM','%c/%d/%Y %l:%i:%s.%f %p')
回答3:
if you want the date and the timestamp of oracle to be compatible with MySql just alter you session
ALTER SESSION SET NLS_DATE_FORMAT = 'YYYY-MM-DD HH24:MI:SS'
ALTER SESSION SET NLS_TIMESTAMP_FORMAT = 'YYYY-MM-DD HH:MI:SS.FF'
it is better to alter session
来源：https://stackoverflow.com/questions/38125393/oracle-to-mysql-timestamp-conversion-in-mysql-insert-statement