ORA-00933 SQL command not properly ended

The error message "ORA-00933: SQL command not properly ended" usually occurs when there is a syntax error in the SQL statement. Here are some possible causes and solutions:

1. Missing or misplaced semicolon: Make sure that you have ended the SQL statement with a semicolon (;). For example:

   SELECT * FROM table_name;
   

2. Incorrect use of parentheses: Check if you have balanced parentheses in your SQL statement. For example:

   SELECT * FROM table_name WHERE column_name = (value);
   

3. Incorrect use of quotation marks: Verify that you have used the correct quotation marks for string literals. In Oracle, single quotation marks ('') are used. For example:

   SELECT * FROM table_name WHERE column_name = 'value';
   

4. Incorrect use of keywords or operators: Ensure that you have used the correct keywords and operators in your SQL statement. For example:

   SELECT * FROM table_name WHERE column_name = 'value' AND column_name2 = 'value2';
   

5. Invalid or unknown SQL function: Check if you are using a valid SQL function and that it is spelled correctly. For example:

   SELECT MAX(column_name) FROM table_name;
   

6. Incomplete or incorrect subquery: Verify that any subqueries in your SQL statement are complete and correctly structured. For example:

   SELECT * FROM table_name WHERE column_name IN (SELECT column_name FROM table_name2);
   

By reviewing your SQL statement and addressing any of these possible causes, you should be able to resolve the ORA-00933 error