Ambiguous column name order by The problem is: t0 and t1 have same column name "area". Sep 5, 2014 · Also, best practice is to qualify all columns referenced in a query with the name of the table, or a table alias, even if the column names are not ambiguous. * FROM TableName t WHERE t. Here is an example of Ambiguous column names: When joining tables, we use aliases in the SELECT statement to indicate the source tables of the selected columns, with each column name prefixed with the table name alias Jan 6, 2024 · When specifying a column in a JOIN, GROUP BY, ORDER BY, or when multiple tables are queried, always providing context either by mentioning the table name or using an alias is crucial. Jul 9, 2024 · I understand how the ambiguous error can come into play with multiple table join query but how does this happen with a single table? How can it be ambiguous? Typically, this is an error when the same column name appears in two or more tables in a query, for instance where a column is a primary key in table1 and a foreign key in table2 and the user hasn't disambiguated which one is being referred to in the order by. I know the column name NAME is available Apr 6, 2016 · Something you can try: 1) Use the table name (or its alias) in the ORDER BY clause: SQL> select is_parent, animals. " What am I doing wrong? SQL Query: select productID, count (stock)as available_count from product_units join product_type ON product_type. 3 days ago · Best Practices for Avoiding Ambiguous Column Names Always Qualify: Get into the habit of qualifying all columns in your SELECT, WHERE, ORDER BY, and GROUP BY clauses whenever you're querying multiple tables. is_parent; no rows selected 2) Write your ordering clause based on the position of fields in your select list: SQL> select is_parent, animals. " Nov 8, 2024 · Our query was asking for the name column, but MySQL didn’t know which name column to return – the one in the Employees table or the one in the Departments table? Jun 19, 2017 · sqlite3を使用してSQL文を試した際に発生するエラーの解決方法について説明しています。 On sql server 2005/2008 with compatibility level 90 or better, yur query runs fine.