Я не могу понять это в postgresql:
SELECT Week1.Material, Week1.VALa, Week1.MVGavgprice, concat(Week1.Material, Week1.VALa)
FROM "Week1"
ОШИБКА:
отсутствует запись предложения FROM для таблицы "week1"
ЛИНИЯ 1: ВЫБЕРИТЕ Week1.Material, Week1.VALa, Week1.MVGavgprice, concat ...
^
Состояние SQL: 42P01
Символ: 8