schema

来源： https://stackoverflow.com/questions/53162285/how-to-compare-two-dataframe-structtype-in-python

来源： https://stackoverflow.com/questions/53162285/how-to-compare-two-dataframe-structtype-in-python

来源： https://stackoverflow.com/questions/21781952/how-to-check-if-postgresql-public-schema-exists

来源： https://stackoverflow.com/questions/2518277/online-collaborative-schema-design-leverage-google-docs

来源： https://stackoverflow.com/questions/30920415/can-you-have-a-custom-attribute-in-yang-schema

来源： https://stackoverflow.com/questions/30920415/can-you-have-a-custom-attribute-in-yang-schema

问题 I'm creating a database users . I want to let users to choose notifications they want to receive by email. Now I have the next columns in table users (boolean type): notification_comment_photo . notification_comment_comment . notification_vote_photo . notification_vote_comment . notification_pm . notification_followed . notification_news . What do you think, should I normalise table users and create another table notifications , considering that this table would have one-to-one relationship

问题 I'm creating a database users . I want to let users to choose notifications they want to receive by email. Now I have the next columns in table users (boolean type): notification_comment_photo . notification_comment_comment . notification_vote_photo . notification_vote_comment . notification_pm . notification_followed . notification_news . What do you think, should I normalise table users and create another table notifications , considering that this table would have one-to-one relationship

问题 I added Cloudkit support to my iOS and WatchOS App, but I cannot deploy my schema to production due to a bug: Do I need to wait until this is fixed so I can deploy to Production or can I ship and still be in Development mode on the console? I've also read that I can edit my plist to switch to development mode but I am not seeing that option in my Entitlements: Update: July 13 6pm EST no longer getting the error message but now it acts as if it is going to deploy but when I hit cancel and

问题 In PySpark it you can define a schema and read data sources with this pre-defined schema, e. g.: Schema = StructType([ StructField("temperature", DoubleType(), True), StructField("temperature_unit", StringType(), True), StructField("humidity", DoubleType(), True), StructField("humidity_unit", StringType(), True), StructField("pressure", DoubleType(), True), StructField("pressure_unit", StringType(), True) ]) For some datasources it is possible to infer the schema from the data-source and get