Microsoft SQL Server Database Quiz Questions

Each column in a SQL Server table must have a unique name to avoid ambiguity and ensure data integrity.

A table in SQL Server can have a maximum of 1024 columns, which is a limitation set by the database system.

In database terminology, a row is often referred to as a tuple.

Each column in a SQL Server table can have a different data type, allowing for diverse data storage within the table.

A primary key column in SQL Server cannot contain NULL values as it uniquely identifies each row in the table.

A table must have at least one column defined in SQL Server.

Computed columns in SQL Server are columns that are derived from an expression involving other columns in the table.

A column in SQL Server is designed to store a single value per cell. Storing multiple values violates the principle of atomicity.

Each row in a SQL Server table represents a single record containing data for each column defined in the table.

Default values for columns in SQL Server can be specified to ensure that a value is provided when no value is explicitly given.

Temporary tables in SQL Server are created with a prefix (# for local and ## for global) and exist only during the session or connection in which they are created.

SQL Server supports the use of foreign keys to enforce referential integrity between tables.

Indexing columns in SQL Server can significantly improve query performance by providing fast access paths to the data.

Constraints like CHECK and DEFAULT in SQL Server ensure that data meets specified rules and default values are applied when no data is provided.

A column with a UNIQUE constraint in SQL Server cannot contain duplicate values; each value must be unique.

The VARCHAR data type in SQL Server is used to store variable-length strings.

The ALTER TABLE command is used to add a new column to an existing table in SQL Server.

The maximum number of rows in a SQL Server table is constrained by the storage capacity of the database and the operating system.

The BLOB data type is not a valid data type in SQL Server. SQL Server uses IMAGE or VARBINARY for binary large objects.

The WHERE clause in SQL Server is used to filter rows in a SELECT statement based on specified conditions.

The primary key in a SQL Server table is used to uniquely identify each row in the table.

The ALTER TABLE command with the DROP COLUMN clause is used to remove a column from a table in SQL Server.

The DATETIME data type in SQL Server is used to store dates and times.

The FOREIGN KEY constraint in SQL Server is used to enforce referential integrity between tables by linking columns in different tables.

The ALTER TABLE command with the ALTER COLUMN clause is used to change the data type of a column in SQL Server.

The PRIMARY KEY constraint is used to define a column as the primary key in SQL Server, ensuring each value is unique and not null.

The UPDATE command in SQL Server is used to modify existing data in a table.

The ORDER BY clause in SQL Server is used to sort the results of a SQL query by one or more columns.

The COUNT() function in SQL Server is used to count the number of rows in a table.

The DEFAULT constraint in SQL Server can be used to specify a default value for a column if no value is provided during insertion.

Constraints like PRIMARY KEY, FOREIGN KEY, UNIQUE, and NOT NULL can be applied to SQL Server table columns to enforce data integrity and rules.

Data types like INT, FLOAT, and DECIMAL in SQL Server are used to store numeric values.

Aggregate functions in SQL Server like SUM(), AVG(), and COUNT() are used to perform calculations on a set of values and return a single value.

Commands like ALTER TABLE, DROP TABLE, and CREATE TABLE in SQL Server are used to modify and manage table structures.

Constraints like CHECK, DEFAULT, and UNIQUE in SQL Server ensure data integrity by enforcing specific rules and conditions on the data.

Commands like CREATE SCHEMA, ALTER SCHEMA, and DROP SCHEMA in SQL Server are used to manage database schemas.

Features like indexing, partitioning, and query optimization in SQL Server enhance data retrieval performance.

Clauses like WHERE, GROUP BY, and HAVING in SQL Server are used in SELECT statements to filter, group, and conditionally include rows in the result set.

Functions like SUBSTRING(), LEN(), and REPLACE() in SQL Server are used to manipulate and process string data.

Commands like BEGIN TRANSACTION, COMMIT, and ROLLBACK in SQL Server are used to control transactions, ensuring data consistency and integrity.

Functions like GETDATE(), CURRENT_TIMESTAMP, and SYSDATETIME() in SQL Server return the current date and time.

Operators like AND, OR, and NOT in SQL Server are used to combine multiple conditions in a query.

Tools like SQL Server Management Studio (SSMS), SQL Server Data Tools (SSDT), and SQL Server Configuration Manager in SQL Server are used for database management.

Features like encryption, auditing, and row-level security in SQL Server support data security by protecting data at rest and in transit, monitoring access, and controlling access to specific rows.

Tools like SQL Server Profiler, Database Engine Tuning Advisor, and Query Store in SQL Server are used for performance tuning by analyzing and optimizing query performance and resource usage.