Tables: t1- actor ( AID varchar(8), name  varchar(30), salary numeric(8,2)) t2- movie ( MID  varchar(8), title varchar(50)) primary key MID t3-actor_role (MID varchar(8), rolename varchar(20)) write queries in SQL to answer each of the following questions: (Table: actor  movie  actor_role) 1. Find the average salary of all actors. 2, Find the actor IAN's AID. 3. Find the names of all actors whose name includes the substring 'au'. 4. Find all actor's name who has had a role in movies (remove duplicates). 5. Find the MID of movie 'Life is Beautiful'.

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A: The answer for the given question is as follows.

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A: The answer for the given question is given below:

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A: I have written the query below:

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Q: How does the GROUPING SETS function enhance the flexibility of grouping operations in SQL?

A: Given,How does the GROUPING SETS function enhance the flexibility of grouping operations in SQL?

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A: Actually, SQL stands for Structured Query Language.

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A: The question uploaded by you contains multiple subparts. As per our policy, experts are only…

Q: Write the following SQL queries based on the following relational schema: Student (stdID: char(5),…

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Q: Instructions: Write the suitable SQL statement to answer the following questions based on the…

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Q: What use cases are best suited for the CROSS APPLY function in SQL?

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