如何确保使用 Spring JPA 以正确的顺序插入 SQL 数据？

Question

When I insert:

data1
data2
data3
data4
data5
..
..
..
dataN

Into a MySQL database with this code:

DataLogg dataLogg = new DataLogg(0, time, DO0, DO1, DO2, DO3, AI0, AI1, AI2, AI3, loggerIdValue, samplingTimeValue, pulseNumber, ControlView.selectedBreakPulseLimit, stopSignal, comment);
dataLoggRepository.saveAndFlush(dataLogg);

It will insert data like this, if I have bad luck.

data1
data2
data4
data3
dataN
..
..
..
data5
    

Question:

How can I guarantee that the same order I insert the rows, I can read them as the same order as well? I don't want it in random order. The last data need to be at the top and the first data need to be at the bottom.

Answer 1

You asked:

How can I guarantee that the same order I insert the rows, I can read them as the same order as well?

The answer is that there is no internal "order" to a SQL table, for all intents and purposes. The way you ensure a certain order when querying is to use an ORDER BY clause with the query, eg

SELECT name
FROM yourTable
ORDER BY name;