Database of Python face questions 46 ask to share

Source: Internet
Author: User

  • What are the common relational databases and non-relational types?
  • MySQL common database engine and comparison?
  • Describe the three main paradigms of data?
  • What is a transaction? How does MySQL support transactions?
  • Describe a one-to-many and many-to-many application scenarios in database design?
  • How to implement mall commodity counter based on database?
  • Common SQL (required)
  • Describe triggers, functions, views, stored procedures?
  • MySQL index type
  • Under what circumstances does the index follow the rule with the leftmost prefix?
  • What is the difference between a primary key and a foreign key?
  • What are the common functions of MySQL?
  • Lists 8 scenarios in which indexes are created but not hit.
  • How do I turn on slow log queries?
  • Database Import Export Command (structure + data)?
  • Database optimization scheme?
  • What is the difference between char and varchar?
  • Brief description of MySQL execution plan?
  • Under the unique index of name, the following differences are outlined:?
    Select from TB where name = ' Oldboy-wupeiqi '?
    Select
    from TB where name = ' Oldboy-wupeiqi ' limit 1
  • 1000w data, when using limit offset paging, why the more backward climb slow? How to solve?
  • What is an index merge?
  • What is an overlay index?
  • Brief description of database read/write separation?
  • A brief description of database sub-Library sub-table? (Horizontal, vertical)
  • Redis and memcached comparison?
  • How many DB and function does the database default in Redis?
  • Python operating module for Redis?
  • If the amount of data in a list in Redis is very large, what if the implementation loops through each of the values?
  • How does Redis implement master-slave replication? and the data synchronization mechanism?
  • What is the role of Sentinel in Redis?
  • How do I implement a Redis cluster?
  • How many hash slots are default in Redis?
  • What are some of the persistence strategies and comparisons of Redis?
  • Lists the expiration policies supported by Redis.
  • MySQL has 2000w data, only 20w of data in Redis, how to ensure that Redis is hot data?
  • Write code to implement FIFO, LIFO, and priority queues based on the Redis list.
  • How do I implement Message Queuing based on Redis?
  • How do I implement publishing and subscriptions based on Redis? And the difference between a publish subscription and a message queue?
  • What is Codis and function?
  • What is twemproxy and function?
  • Write code to implement Redis transactional operations.
  • What is the function of the Watch command in Redis?
  • How can I implement the mall commodity quantity counter based on Redis?
  • The implementation mechanism of Redis distributed lock and Redlock is briefly introduced.
  • What is a consistent hash? Is there a corresponding module in Python?
  • How to efficiently find all keys in Redis that start with Oldboy?
  • Database of Python face questions 46 ask to share

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