集合查找函数:find_in_set 字符串反转函数:reverse CREATE TABLE temp (id int,name string,email string,phone string) INSERT INTO temp VALUES (1, 'John Doe', 'john.doe@example.com', '123-456-7890'), (2, 'Jane Smith', 'jane.smith@example.com', '555-555-5555'), (3, 'Bob Johnson...
FIND_IN_SET(S, SL):返回字符串 S 在字符串 SL 第一次出现的位置,SL 是用逗号分割的字符 串。如果没有找该 S 字符串,则返回 0。 示例:select find_in_set('a 小 b','cd,ef,a 小 b,de') as ttt from DB表输入 11. 字符串替换
encode(string src, string charset) binary find_in_set(string str, string strlist) int format_number(number x, int d) string get_json_object(string json_string, string path) string in_file(string str, string filename) boolean instr(string str, string substr) int length(string a) int loc...
spark.sql("SELECT * FROM emp LEFT ANTI JOIN dept ON emp.deptno = dept.deptno").show() 1. 2. 2.7 cross join CROSS JOIN 称为“交叉连接”或者“笛卡尔连接”。SQL CROSS JOIN 连接用于从两个或者多个连接表中返回记录集的笛卡尔积,即将左表的每一行与右表的每一行合并。 empDF.join(deptDF, join...
SparkSQL相关语句总结 1.in 不支持子查询 eg. select * from src where key in(select key from test);支持查询个数 eg. select * from src where key in(1,2,3,4,5); in 40000个 耗时25.766秒 in 80000个 耗时78.827秒 2.union all/union不支持顶层的union all eg. select key from src UNION...
2.druid是阿里的连接池服务,也提供了解析SQL的工具类入口,能够解析mysql,hive,clickhouse,hbase等十几种SQL,出来的结果直接是可使用的结果,但是有一些语句还是不支持 3.SparkSqlParser是spark的工具类,可以将SQL直接转换为逻辑执行计划的JSON格式,可以解析所有结果,但是逻辑较为复杂,还需要手动去除注释,set的语句等 ...
$ $SPARK_HOME/sbin/start-connect-server.sh --packages "org.apache.spark:spark-connect_2.12:3.5.1,io.delta:delta-spark_2.12:3.0.0" \ --conf "spark.driver.extraJavaOptions=-Divy.cache.dir=/tmp -Divy.home=/tmp" \ --conf "spark.sql.extensions=io.delta.sql.DeltaSparkSessionExtension" ...
To find the output in Azure Machine Learning studio, open the child job, choose the Outputs + logs tab, and open the logs/azureml/driver/stdout file, as shown in this screenshot:Use the SynapseSparkStep in a pipelineThe next example uses the output from the SynapseSparkStep created in ...
Explanation of all Spark SQL, RDD, DataFrame and Dataset examples present on this project are available at https://sparkbyexamples.com/ , All these examples are coded in Scala language and tested in our development environment. Table of Contents (Spark Examples in Scala) Spark RDD Examples Crea...
3、关闭广播变量join:set spark.sql.autoBroadcastJoinThreshold = -1 问题三: 日志中出现:org.apache.spark.sql.catalyst.parser.ParseException 原因分析: spark在做sql转化时报错。 解决方案: 检查sql是否书写正确 问题四: 日志中出现:SparkException: Could not find CoarseGrainedScheduler ...