事务
有如下表格
| Isolation Level | Dirty Read | Nonrepeatable Read | Phantom/ˈfæntǝm/ Read |
|---|---|---|---|
| Possible | Possible | Possible | |
| Read committed | Not possible | Possible | Possible |
| Repeatable read | Not possible | Not possible | Possible |
| Serializable | Not possible | Not possible | Not possible |