[英]How to export SQL results to CSV from an SQL script using DB2 database?
[英]How to read with SQL from DB2 using pyspark?
我想使用帶有pySpark的SQL語句連接並從DB2中讀取。 我在互聯網上找到的唯一代碼讀取整個表,如下所示
user = <username>
password = <password>
jdbcURL = "jdbc:db2://xx.xx.xxx.xxx:50000/Database"
prop = {"user":user, "password":password, "driver":"com.ibm.db2.jcc.DB2Driver", "sslConnection":"false"}
table = <schema.table>
df = sqlContext.read.jdbc(url=jdbcURL,table=table,properties=prop)
df.count()
我想使用類似
'select * from table limit 100'
能否請你幫忙?
您可以像下面在Pyspark
一樣從任何JDBC
源中讀取
df = sqlContext.read.format('jdbc').option('url', '{}:{}/{}'.format(domain, port, dbname)).option('driver', 'com.mysql.jdbc.Driver').option('dbtable', '(select * from `{}`) as `{}`'.format(table, table)).option('user', username).option('password', password).load()
希望這可以幫助
根據@ User12345的響應,此操作如下
df = (sqlContext.read.format('jdbc') .option('url',
'jdbc:db2://xx.xx.xxx.xxx:50000/myDatabase') .option('driver',
'com.ibm.db2.jcc.DB2Driver') .option('dbtable', "(SELECT * FROM mySchema.myTable
limit 100) as t") .option('user', user).option('password', password).load())
df.count()
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.