What is Field List ambiguous?
This error occurs when you are trying to fetch some data from multiple tables with the help of a join query. But if the same field name is present in both tables, and you are not passing the table name as part of the column identifier, the query will be unsuccessful.
How do I fix error 1052 in mysql?
Fixing the error To fix this, simply add the tablename or alias for the table you want to work with. If you are writing the query yourself, this is a bit easier to deal with as you will know which table you meant to use. In our example, we should add the alias for the oc_customer table, c, to the column names.
What is ambiguous in mysql?
This means two columns have the same column name — that is the “Name” column. The SQL Machine is confused as to which “Name” out of the two tables you are referring to. It is ambiguous — not clear. To clarify this, add the alias of either or both TABLE1 or TABLE2 to the columns having the same name.
What is error code 1054 in MySQL?
MySQL error code 1054 occurs if we forget to add single quotes while inserting a varchar value or due to any missing column.
How do you create a self join in SQL?
To use a self join, the table must contain a column (call it X) that acts as the primary key and a different column (call it Y) that stores values that can be matched up with the values in Column X. The values of Columns X and Y do not have to be the same for any given row, and the value in Column Y may even be null .
Is ambiguous inside Bigquery?
When you are joining multiple tables in a SQL query and if a column with the same name is present in both the tables, Bigquery doesn’t know which one to use (unless you explicitly tell so), so it throws the ambiguous column name error.
What is ambiguous error?
[‚am·bə′gyü·əd·ē ‚er·ər] (computer science) An error in reading a number represented in a digital display that can occur when this representation is changing; for example, the number 699 changing to 700 might be read as 799 because of imprecise synchronization in the changing of digits.
What is error code 1064 in MySQL?
The MySQL error 1064 is a syntax error, meaning that the MySQL is unable to understand the command you are issuing, because your command is not a valid one within the Structured Query Language or SQL.
How do I correct a mistake in MySQL?
There are five methods you can try to fix the MySQL 1064 error when you encounter it, depending on its most likely cause:
- Correct mistyped commands.
- Replace obsolete commands.
- Designate reserved words.
- Add missing data.
- Transfer WordPress databases in compatibility mode.
How to solve ” column’user id’in field list is ambiguous ” error?
So, MySQL gets confused and generates the Column ‘ user_id ‘ in field list is an ambiguous error. In this solution, you can see that the table name is specified using dot (.). Aliases u is for users table and ud is for user_details table. So, MySQL does not get confused after encountering u.user_id and ud.user_id.
What happens if the field name is the same in both tables?
But if the same field name is present in both tables, and you are not passing the table name as part of the column identifier, the query will be unsuccessful. In the above example, we are trying to fetch data from two tables, users and user_details by using table join. And you can see, the name of one field user_id is present in both the tables.
How to join two columns in a database?
The simplest solution is a join with USING instead of ON. That way, the database “knows” that both id columns are actually the same, and won’t nitpick on that: If id is the only common column name in tbl_names and tbl_section, you can even use a NATURAL JOIN: What you are probably really wanting to do here is use the union operator like this:
