Watch this video on MySQL Interview Questions and Answers: 3. What is the default port for MySQL Server? The default port for MySQL Server is 3306. Another standard default port is 1433 in TCP/IP for SQL Server. 4. What is the difference between CHAR and VARCHAR? When a table is create...
Prepare for your next interview with the top 40 MySQL questions and answers for beginners and experienced professionals in 2024 boosting your success.
对于outer joins, 先 on 后 where ONclause -Beforejoining. 在join之前将被过滤, 有些结果可能为null(因为outer join)。 WHEREclause:Afterjoining. 在join之后过滤记录,一般可以过滤掉 null。 “A LEFT JOIN B ON 条件表达式” 中的ON用来决定如何从 B 表中检索数据行。如果 B 表中没有任何一行数据匹配 ON...
By mastering the given MySQL interview questions, you will be well-equipped for your dream job and can make a valuable contribution to any organization or business that relies on data-driven decision-making. Did we miss any important MySQL interview questions in this article? do share them in ...
10. What are the two methods of doing INNER JOINs in MySQL? The inner join is also called a natural join. Inner join adds the records to the resultset only if both the tables have the record with the matching condition. In other words, it checks for equality. We can do an inner joi...
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6. Mysql Questions 7. Mysql Thread Cache Thread Cache Size Threads Cached Threads Created 8. Temporary Objects Created Tmp Tables Created Tmp Disk Tables Created Tmp Files 9. Mysql Select Type Select Scan Select Full Join Select Range Select Range Check ...
A: If you answer "YES" to any of the following questions, then you should consider MySQL NDB Cluster as an option for your application's database: Do you need to shard your database to meet growing volumes of write (UPDATE, INSERT, DELETE) operations? Do you need to ensure results ...
23.6.6: Can you insert into views that are based on joins? Questions and Answers 23.6.1: Does MySQL 5.4 have table snapshots? No. 23.6.2: Does MySQL 5.4 have materialized views? No. 23.6.3: What happens to a view if an underlying table is dropped or renamed? After a view...
a LEFT JOIN b USING (c1, c2, c3) a LEFT JOIN b ON a.c1 = b.c1 AND a.c2 = b.c2 AND a.c3 = b.c3 With respect to determining which rows satisfy the join condition, both joins are semantically identical. With respect to determining which columns to display for SELECT * expansion...