But the next question is: what language should we use to translate it? Where to Find Correct Language?Īgain, for mapping what NLS_DATE_LANGUAGE should be used to translate the string, you should check valid day values of week for different languages. You need to tell it how to translate it by adding NLS parameter option. Under current NLS_DATE_LANGUAGE (Japanese), SQL engine doesn't know what "Vendredi" means. Select TO_DATE(', Vendredi', 'YYYY-MM-DD, Day') from dual SQL> select TO_DATE(', 金曜日', 'YYYY-MM-DD, Day') from dual ģ0-8月 -19 ORA-01846 due to Foreign Day Value of Weekįor some reason, you might use a foreign day value of week in your statement like the following: SQL> select TO_DATE(', Vendredi', 'YYYY-MM-DD, Day') from dual To solve such error pattern, you have to know valid and correct day values of week for different NLS_DATE_LANGUAGE. Indeed, "きんようび" is also a correct expression of Friday in Japanese, but it's invalid to Oracle. ORA-01846: not a valid day of the week Where to Find Valid Day Value of Weeks? Select TO_DATE(', きんようび', 'YYYY-MM-DD, Day') from dual
SQL> select TO_DATE(', きんようび', 'YYYY-MM-DD, Day') from dual Then we used a term "きんようび" which also means "Friday" in Japanese. SQL> alter session set nls_date_language='Japanese' Let's see an example.įirst of all, switch NLS_DATE_LANGUAGE to JAPANESE. You might see there's nothing wrong in your day value of week, but the day value of week you used may not be acceptable by Oracle. SQL> select TO_DATE(', Friday', 'YYYY-MM-DD, Day') from dual ģ0-AUG-19 ORA-01846 due to Unmatched Day Value of Week For example, the spell checker plugins of Notepad++.
If you found nothing wrong, maybe you should paste your input string into a text editor and make it run spell checker. The solution is easy, please recheck your spelling and correct it. In the above example, we misspelled "Friday" as another one in TO_DATE function, that's why SQL engine cannot recognize the day value of week. Select TO_DATE(', Freddy', 'YYYY-MM-DD, Day') from dual SQL> select value from v$nls_parameters where parameter = 'NLS_DATE_LANGUAGE' ĪMERICAN SQL> select TO_DATE(', Freddy', 'YYYY-MM-DD, Day') from dual There might be typos in your statement just like the following example. ORA-01846 due to Misspelled Day Value of Week In this post, I will talk about some error patterns of ORA-01846 listed below: ORA-01846 means that SQL engine cannot recognize the day value of week of your input string under current NLS_DATE_LANGUAGE.
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