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SQL QUERY

Unit 1

SQL Queries

Introduction to SQL Queries SQL Select Query SQL Update Query SQL Delete Query SQL Join Query

Unit 2

SQL Functions

SQL Aggregate Functions SQL String Functions SQL Date Functions

Unit 3

SQL Indexes

Introduction to SQL Indexes SQL Index Types

Unit 2 • Chapter 1

SQL Aggregate Functions

Video Summary

The paper proposes a new method for generating text summaries. The method is based on a neural network that is trained on a large corpus of text. The network is able to learn the important information in a text and generate a summary that captures the main points. The method is evaluated on a number of datasets and shows that it is able to generate summaries that are both concise and informative.

Knowledge Check

What is a SQL aggregate function?

a function that computes a single value from a set of values

a function that returns a single row of data

a function that returns a single column of data

a function that returns the count of rows in a table

What are the three most common SQL aggregate functions?

COUNT, SUM, AVG

MAX, MIN, COUNT

COUNT, SUM, AVG, MAX, MIN

MIN, AVG, SUM

What is the difference between a SQL aggregate function and a SQL scalar function?

an aggregate function returns a single value from a set of values, while a scalar function returns a single value from a single value

an aggregate function returns a single value from a single value, while a scalar function returns a single value from a set of values

an aggregate function returns a single row of data, while a scalar function returns a single column of data

an aggregate function returns a single column of data, while a scalar function returns a single row of data

SQL QUERY

SQL Aggregate Functions

Video Summary

Knowledge Check

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SQL String Functions

SQL Join Query