Use soft delete to delete data in database

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One . Soft delete （ Logical deletion ）：（Soft Deleting）, That is, when the data in the data table is deleted , It is not removed directly from the data table , It's marked as deleted , That is to set a delete field in each table （ Such as ：IsDeleted） etc. , By default, the value is 0, And undeleted state ; When you need to delete data , Update this field to 1.

In reality , What we mean by deletion is not really deletion , Often we delete some data in the database after , It's hard to recover , In this way, it will be more convenient to use soft deletion to check again .

for example ：

• company “ fire ” An employee , Instead of deleting employees ;
• company “ Cancel ” The order , Instead of deleting the order ;
• company “ Discontinue use ” A device , Instead of deleting a device ;

Here we're going to use dismissal , Cancel , Stop using instead of “ Delete ”;

When you want to see the data status again , As long as IsDeleted To change the value of 0 that will do .

Two . Hard delete （ Physical delete ）： Really delete data from the database , The data disappears .