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Why do I have ORA-00904 even when the column is present? ORA-00904-invalid identifier errors are frequently caused by case-sensitivity issues Normally, Oracle tables and columns are not case sensitive and cannot contain punctuation marks and spaces But if you use double quotes to create a quoted identifier, that identifier must always be referenced with double quotes and with the correct case For example: create table bad_design
sql - ORA-00904: invalid identifier - Stack Overflow More informations about your ERROR ORA-00904: string: invalid identifier Cause: The column name entered is either missing or invalid Action: Enter a valid column name A valid column name must begin with a letter, be less than or equal to 30 characters, and consist of only alphanumeric characters and the special characters $, _, and #
ORA-00922: missing or invalid option when creating tables I entered the following SQL commands in Oracle but it complained "ORA-00922: missing or invalid option" CREATE TABLE Student ( StuID NUMBER(15), StuName VARCHAR2(50), Phone