How to Update Multiple Tables with Identical Values in MySQL?

Updating Multiple Tables with Identical Values

Query Considerations:

The objective is to update two tables, Table_One and Table_Two, with identical values for specific columns (i.e., win, streak, and score) based on specific criteria (i.e., userid). However, the tables have some differences: Table_Two lacks the lid field, and their names vary.

Multi-Table Update Approach:

MySQL offers the flexibility to perform multi-table updates through a single query. This approach leverages the power of joins to relate the tables based on common columns, enabling the simultaneous update of multiple rows across the participating tables.

Updated Query:

<code class="sql">UPDATE Table_One a
INNER JOIN Table_Two b ON (a.userid = b.userid)
SET
  a.win = a.win+1, a.streak = a.streak+1, a.score = a.score+200,
  b.win = b.win+1, b.streak = b.streak+1, b.score = b.score+200
WHERE a.userid = 1 AND a.lid = 1 AND b.userid = 1;</code>

In this multi-table update query:

• The INNER JOIN clause establishes a relationship between the two tables based on the userid column.
• The SET clause specifies the columns and updated values for both Table_One and Table_Two.

Limitations and Alternatives:

It is crucial to note that multi-table updates do not support LIMIT. Consequently, the query may update more rows than intended. Therefore, transactions or stored procedures may be more suitable solutions to ensure both updates are executed atomically.

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