Here are a few article titles based on your text in a question format: * How to Access Query Results as User Variables in MySQL? * Can I Assign User Variables Based on Query Results in MySQL? * What

Accessing Query Results as User Variables in MySQL

Setting user variables based on query results is feasible in MySQL, alleviating the need for nested queries.

Approach:

To accomplish this, incorporate the variable assignment within the query itself:

<code class="mysql">SET @user := 123456;
SELECT @group := `group` FROM user WHERE user = @user;
SELECT * FROM user WHERE `group` = @group;</code>

Example:

Consider a table named "user" with columns "user" and "group":

<code class="mysql">CREATE TABLE user (`user` int, `group` int);
INSERT INTO user VALUES (123456, 5);
INSERT INTO user VALUES (111111, 5);</code>

Query:

<code class="mysql">SET @user := 123456;
SELECT @group := `group` FROM user WHERE user = @user;
SELECT * FROM user WHERE `group` = @group;</code>

Output:

<code class="mysql">+--------+-------+
| user   | group |
+--------+-------+
| 123456 |     5 |
| 111111 |     5 |
+--------+-------+
2 rows in set (0.00 sec)</code>

Alternate Approach:

An alternative method is to use "LIMIT 1" within a subquery:

<code class="mysql">SET @user := 123456;
SELECT `group` FROM user LIMIT 1 INTO @group; 
SELECT * FROM user WHERE `group` = @group;</code>

Remember to use := as the assignment operator in SET statements. Non-SET statements require := for assignment, while = is treated as a comparison operator.

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