Introduction to SQL
This language is used to manage and manipulate databases
What is SQL
This SQL command adds new records to a table
What is INSERT
This function is used to calculate the total number of entries in a dataset
What is COUNT()
This SQL command reverts changes made during the current transaction, undoing any updates
What is ROLLBACK
Businesses use SQL to analyze this aspect of their operations for better decision-making
What is sales performance
SQL is primarily used for this type of database
What is a relational database
This command modifies existing records in a table
What is UPDATE
This command groups records that have the same values in specified columns
What is GROUP BY
This SQL command saves all changes made during the current transaction, making them permanent
What is COMMIT
Companies might use SQL to examine this behavior for marketing strategies
What is customer purchase behavior
This SQL command retrieves data from a database table
What is SELECT
This command removes records from a table
What is DELETE
This type of function allows you to compute the average value of a column
What is AVG()
This technique involves placing a query within another query
What is a subquery
This analysis reveals patterns over time in datasets
What is trend analysis
SQL stands for this
What is Structured Query Language
This clause is used to specify conditions when retrieving data
What is WHERE
This SQL query retrieves data from multiple tables based on related columns
What is a JOIN
This SQL command retrieves data from a table and allows you to access data from the next row in the result set without using a self-join
What is LEAD
This analysis can reveal unexpected values that deviate significantly from the rest of the data
What are outliers
This system allows for storing, managing, and analyzing large datasets efficiently
What is a Relational Database Management System (RDBMS)
This SQL statement organizes records in a specific order
What is ORDER BY
This SQL clause filters groups based on specified conditions
What is HAVING
These functions provide access to rows at a specific position within a result set
What are window functions
SQL's ability to analyze data helps companies optimize this aspect of their operations
What is inventory management