ORA-00933: SQL command not properly ended - Troubleshooting Guide - 常规

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:

Missing or misplaced semicolon: Make sure that you have ended the SQL statement with a semicolon (;). For example:
```
SELECT * FROM table_name;
```
Incorrect use of parentheses: Check if you have balanced parentheses in your SQL statement. For example:
```
SELECT * FROM table_name WHERE column_name = (value);
```
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';
```
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';
```
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;
```
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.