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View Code? Open in Web Editor NEWAU DB 2030 - Advanced database implementation with support of SQL queries
AU DB 2030 - Advanced database implementation with support of SQL queries
Индексы
Can't open table table1 при каждом запуске
Последовательность:
INSERT 1000 (это сейчас делается в table1
delete from table1 where (number > 900)
select * from table1
Результат: вывод 900 записей а потом
Error: nulljava.lang.NullPointerException
А если удалять из начала:
delete from table1 where number < 100
То вообще ничего не увидим
В чате было обсуждение. Приоритет маленький.
Не работает сравнение INT DOUBLE во where на < >.
В тестах: testdoubleTest
Делаем
CREATE TABLE inttab (id INT, text VARCHAR (9), val DOUBLE)
Выключаем бд,
Теперь tableManager.getTable(table).getNames().length == 0
CREATE TABLE inttab (number VARCHAR(15), text VARCHAR(9))
INSERT number 0000 - 10000
SELECT * FROM inttab WHERE number < 1000
Выдаст только первые сто результатов
Хотел куда-то сохранить запрос чтобы каждый раз не писать
select * from table1 join table2 on table1.text = table2.text where number < 010
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