Common SQL Errors and How to Fix Them
Browse all documented SQL errors with detailed explanations, root causes, and step-by-step fixes.
SQL syntax error near 'SELECT' at or around 'FROM' position
This error means that the SQL statement contains a syntax error, specifically around the 'FROM' keyword. This can be due…
ORA-04063: view 'HR.EMPLOYEES_V' has a RECURSIVE WITH reference to itself, but n
This error occurs when a view or a query attempts to reference itself in a recursive WITH clause, which is not allowed i…
Cannot drop index 'idx_orders_date' because the index is used by a view or a tri
This error occurs when an attempt is made to drop an index that is being used by a view, trigger, or constraint in the d…
Incorrect syntax near the keyword 'FROM'. Expecting 'IDENTIFY', 'INSERT', 'PROCE
This error occurs when the SQL parser encounters a syntax that is not recognized or is invalid for the current statement…
SQLSTATE[HY000] [20006] The MySQL server has gone away
This error occurs when the MySQL server times out due to an idle connection or a large result set, usually because the q…
Error executing query: Window function requires ORDER BY clause with a column of
This error occurs when a window function in SQL is used without a valid ORDER BY clause. The ORDER BY clause is required…
Error in SQL syntax near 'FROM'. Expecting SELECT or VALUES clause.
This error occurs when SQL interpreter encounters a syntax error in the query, specifically when trying to execute a que…
Cannot drop index 'PK_orders': There are references to 'PK_orders' from view 'vw
This error occurs when attempting to drop a primary key constraint that is being referenced by another object, such as a…
SQL Error: Column 'age' not found in table 'users'.
This error occurs when SQL tries to select, insert, update or delete a column that does not exist in the specified table…
SQL Error (1146): Table 'mydb.mycustomer' doesn't exist
This error occurs when the database engine cannot find a specified table in the database. The table may have been delete…
Misplaced keyword keyword ELSE near 'FROM'
This error occurs when SQL encounters an ELSE keyword outside of a conditional statement, such as an IF or CASE statemen…
Cannot insert duplicate key row in table 'orders' with unique index 'PK_orders_i
This error occurs when you try to insert a new row into a table that contains a unique index, such as a primary key, and…
Have a SQL error that's not listed? Get an instant explanation.
Explain Another Error