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It has the same error, SQL Error: 1241, SQLState: 21000 Operand should contain 1 column(s). But I'll remove these two parts:': roleUsers IS NULL OR ' and ' :roleDepts IS NULL OR ', It can run normally and return the result I want.
6 Οκτ 2021 · The error Operand should contain 1 column(s) is most likely caused by a subquery that’s returning more than one column. Here’s a typical SELECT query that causes this error: SELECT column_one, (SELECT column_two, column_three FROM table_two) FROM table_one;
10 Νοε 2021 · SELECT students.name FROM cities; -- ERROR 1054 (42S22): Unknown column 'students.name' in 'field list'. This is because you are trying to query a column owned by students table from the cities table, which doesn’t match.
25 Ιαν 2013 · However, ideally you should consider normalizing the team table so you have one column with the player name and another column that assigns them a player number. Similar to this: create table team ( player varchar(50), playerNumber int ); Then when you are searching the team data you only have to join on one column instead of 8 different columns.
27 Ιουλ 2023 · ERROR 1140 (42000): In aggregated query without GROUP BY, expression #1 of SELECT list contains nonaggregated column 'world.City.District'; this is incompatible with sql_mode=only_full_group_by. Here, the last column in my SELECT list is causing the problem.
16 Ιουλ 2023 · ERROR 1364 (HY000): Field 'ProductName' doesn't have a default value. In this case, I tried to insert a row into the table, but I didn’t specify a value for the ProductName column. MySQL returned an error because the column has no default value and it’s a NOT NULL column.
2 Οκτ 2021 · When you execute a MySQL statement, you may sometimes encounter ERROR 1054 as shown below: mysql> SELECT user_name FROM users; ERROR 1054 (42S22): Unknown column 'user_name' in 'field list'. The ERROR 1054 in MySQL occurs because MySQL can’t find the column or field you specified in your statement.
