Implementing Redis aggregation queries using Java

Implementing various aggregate queries in Redis using Java can leverage Redis' Lua script functionality. Firstly, use Maven to add Redis dependencies: <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>3.6.0</version> </dependency> Then create a Jedis connection instance and execute the Lua script for aggregation queries: import redis.clients.jedis.Jedis; public class RedisAggregation { public static void main(String[] args) { //Create Jedis Connection Jedis jedis = new Jedis("localhost"); //Execute sum aggregation query String sumScript = "local sum = 0 " + "for i, v in ipairs(ARGV) do " + " sum = sum + tonumber(v) " + "end " + "return sum"; String[] values = {"10", "20", "30"}; Long sum = (Long) jedis.eval(sumScript, 0, values); System.out.println("Sum: " + sum); //Execute count aggregation query String countScript = "return #ARGV"; Long count = (Long) jedis.eval(countScript, 0, values); System.out.println("Count: " + count); //Execute average aggregation query String averageScript = "local sum = 0 " + "for i, v in ipairs(ARGV) do " + " sum = sum + tonumber(v) " + "end " + "local count = #ARGV " + "return sum / count"; Double average = (Double) jedis.eval(averageScript, 0, values); System.out.println("Average: " + average); //Close Jedis connection jedis.close(); } } The above code implements three types of aggregate queries: sum, count, and average. The 'ARGV' in the script represents the incoming parameters, and aggregates multiple values by passing a parameter array in 'jedis. eval()'. Finally, execute the Lua script through 'jedis. eval()' and obtain the results. Note: In practical applications, the script for aggregate queries may be more complex and can be customized according to specific needs.