DROP STREAM cr7_topic_stream; 1. 创建Table 必须要含有主键,主键是Kafka生产者生产消息时指定的key。 ksql> CREATE TABLE cr7_topic_table ( orderAmount INTEGER, orderId INTEGER, productId INTEGER, productNum INTEGER, kafkaProducerKey VARCHAR PRIMARY KEY ) WITH (kafka_topic='cr7-topic',value_format=...
DROP STREAM cr7_topic_stream; 创建Table 必须要含有主键,主键是Kafka生产者生产消息时指定的key。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ksql> CREATE TABLE cr7_topic_table ( orderAmount INTEGER, orderId INTEGER, productId INTEGER, productNum INTEGER, kafkaProducerKey VARCHAR PRIMARY KEY...
ksqlDB 为跟踪、理解和管理警报提供了一种熟悉的语法。 CREATE TABLE error_counts AS SELECT error_code, count(*) FROM monitoring_stream WINDOW TUMBLING (SIZE 1 MINUTE) WHERE type = 'ERROR' GROUP BY error_code EMIT CHANGES; 1. 2. 3. 4. 5. 6. 与外部数据源和接收器集成 ksqlDB 包括与Kafka...
LAST_NAME string, EMAIL string) WITH (KAFKA_TOPIC='dbserver1.inventory.customers', VALUE_FORMAT='json'); CREATE TABLE T_CUSTOMERAS SELECT id, latest_by_offset(first_name) as fist_name, latest_by_offset(last_name) as last_name, latest_by_offset(email) as email ...
CREATESTREAM vip_actionsASSELECT*FROMuser_activitiesWHEREaction='purchase'EMIT CHANGES; AI代码助手复制代码 四、流处理实战 4.1 电商场景案例 需求:实时统计每5分钟窗口的销售额 CREATETABLEsales_summaryASSELECTitem_id,SUM(price)AStotal_sales, WINDOWSTARTASwindow_startFROMpurchasesWINDOWTUMBLING (SIZE5MINUTES)GR...
CREATESTREAM“enriched_brand_products”WITH(kafka_topic=‘enriched_brand_products’)ASSELECT“brand”.“id”as”brand_id”,”brand”.”tenant_id”as”tenant_id”,CAST(brand_product.idASVARCHAR)as”id”,brand_product.nameAS”name”FROM”brand_products”ASbrand_productINNERJOIN”brands_table” ”bra...
删除Stream DROP STREAM cr7_topic_stream; 创建Table 必须要含有主键,主键是Kafka生产者生产消息时指定的key。 ksql> CREATE TABLE cr7_topic_table ( orderAmount INTEGER, orderId INTEGER, productId INTEGER, productNum INTEGER, kafkaProducerKey VARCHAR PRIMARY KEY ) WITH (kafka_topic='cr7-topic',value_...
CREATE TABLE error_counts AS SELECT error_code, count(*) FROM monitoring_stream WINDOW TUMBLING (SIZE 1 MINUTE) WHERE type = 'ERROR' GROUP BY error_code EMIT CHANGES; 与外部数据源和接收器集成 ksqlDB 包括与Kafka Connect数据源和接收器的原生集成,有效地为各种外部系统提供统一的 SQL 接口。
ksqldb作为一款事件流数据库,与传统数据库既有相似,也有不同 ksql> show topics;topic在ksqldb的位置等于table在mysql中的位置 ksql> CREATE STREAM users ( > ROWKEY INT KEY, > USERNAME VARCHAR …
Use a KStream to represent data in the score-events topic, which is currently unkeyed. Create a partitioned (or sharded) table for the players topic, using the KTable abstraction. Create a GlobalKTable for the products topic, which will be replicated in full to each application instance. By...