Update materialize-mysql.md (#22275)

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曲正鹏 2021-03-29 20:20:25 +08:00 committed by GitHub
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@ -69,7 +69,7 @@ MySQL DDL queries are converted into the corresponding ClickHouse DDL queries ([
- MySQL `INSERT` query is converted into `INSERT` with `_sign=1`.
- MySQl `DELETE` query is converted into `INSERT` with `_sign=-1`.
- MySQL `DELETE` query is converted into `INSERT` with `_sign=-1`.
- MySQL `UPDATE` query is converted into `INSERT` with `_sign=-1` and `INSERT` with `_sign=1`.