To answer this question, you need to understand the syntax of the SELECT statement in SQL. Let's go through each option to understand why it is correct or incorrect:

Option A) SELECT * FROM Sales - This option is correct because it uses the SELECT statement to retrieve all records from the table named Sales. The asterisk (*) is a wildcard that represents all columns in the table, so this statement will select all records with all their columns.

Option B) DELETE FROM Sales - This option is incorrect because it uses the DELETE statement, which is used to delete records from a table. It does not retrieve or select any data from the table.

Option C) SELECT * FROM SALES WHERE OrderID < 1 - This option is incorrect because it includes a WHERE clause with a condition (OrderID < 1), which will filter the records based on that condition. It will not select all records from the table.

Option D) SELECT FROM Sales - This option is incorrect because it does not specify which columns to select. In a SELECT statement, you need to specify the columns you want to retrieve. The correct syntax is SELECT column1, column2, ... FROM Sales.

The correct answer is Option A) SELECT * FROM Sales. This option is correct because it uses the SELECT statement with the wildcard (*) to select all records with all their columns from the table named Sales.

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• Wrong explanation

To answer this question, you need to understand SQL clauses and their purposes. Let's go through each option to understand why it is correct or incorrect:

Option A) WHERE - This option is correct because the WHERE clause in SQL is used to specify a search condition. It is typically used in conjunction with the SELECT statement to filter rows based on a specific condition.

Option B) SEARCH - This option is incorrect because there is no SQL clause called SEARCH. The correct clause for specifying a search condition is WHERE.

Option C) FROM - This option is incorrect because the FROM clause in SQL is used to specify the table or tables from which to retrieve data, not to specify a search condition.

Option D) WHILE - This option is incorrect because the WHILE clause is not used in SQL to specify a search condition. It is typically used in looping constructs, such as in programming languages like SQL Server or MySQL.

The correct answer is A) WHERE. This option is correct because the WHERE clause is used in SQL to specify a search condition.

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• Wrong explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) Determines if a value matches any of the values in a list or a sub-query - This option is correct. The IN keyword is used in SQL to determine if a value matches any of the values in a list or a sub-query. It is typically used in the WHERE clause of a query to specify a condition.

Option B) Defines the tables we are selecting or deleting data from - This option is incorrect. The FROM keyword is used to define the tables we are selecting or deleting data from in SQL.

Option C) Is used with the DISTINCT SQL keyword only - This option is incorrect. The IN keyword is not specifically used with the DISTINCT keyword. The IN keyword can be used with any other SQL keyword or clause.

Option D) Is used to select data from a view - This option is incorrect. The IN keyword is not specifically used to select data from a view. It is used to compare a value with a list of values or the result of a sub-query.

The correct answer is Option A. The IN keyword in SQL is used to determine if a value matches any of the values in a list or a sub-query.

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• Wrong explanation

To answer this question, we need to understand what SQL aggregate functions are.

SQL aggregate functions perform calculations on a set of values and return a single value as the result. They are used with the SELECT statement to perform operations such as calculating the average, sum, count, minimum, or maximum value of a column.

Let's go through each option to understand why it is correct or incorrect:

Option A) LEFT - This option is incorrect because LEFT is not an aggregate function. It is used to extract a specified number of characters from the left side of a string.

Option B) LEN - This option is incorrect because LEN is not an aggregate function. It is used to return the length of a string.

Option C) AVG - This option is correct because AVG is an aggregate function in SQL. It is used to calculate the average value of a column.

Option D) JOIN - This option is incorrect because JOIN is not an aggregate function. It is used to combine rows from two or more tables based on a related column between them.

The correct answer is C) AVG. This option is correct because AVG is a SQL aggregate function used to calculate the average value of a column.

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• Wrong explanation