tsql.tar.gz

T-SQL-SPA

T-SQL is a dialect of SQL that is used in Microsoft SQL Server. The popularity of Microsoft's database management system sustains high market demand for people well versed in T-SQL. 

This course teaches the core concepts and syntax of T-SQL. First, you will learn how to create tables, insert data, update existing records, and create relationships between tables. Then, you will be exposed to more advanced constructs of T-SQL, like stored procedures, functions, and triggers. 

By the end of the course, you will be sufficiently adept with T-SQL and be able to perform your day-to-day tasks as software and database developers effectively.

Querying Databases Using Transact-SQL

Data in an MS SQL Server database is *not* read-only by default. We can update and delete data when needed.


## The `UPDATE` command

It is possible to make changes to existing data in tables. To modify the data, we use the `UPDATE` command, with this basic syntax:

```SQL
UPDATE TableSchema.TableName
SET Column1Name = [NewValue], Column2Name = [NewValue]
WHERE [Condition that decides which rows to update]
```

> **Note:** The `WHERE` part of the command is optional. However, if it is left out, all the rows will be updated.

In this example, we’ll set the value of the `PhoneNumber` column to `Unspecified` in all rows:


Data in an MS SQL Server database is *not* read-only by default. We can update and delete data when needed.


# The `UPDATE` command

It is possible to make changes to existing data in tables. To modify the data, we use the `UPDATE` command, with this basic syntax:

```SQL
UPDATE TableSchema.TableName
SET Column1Name = [NewValue], Column2Name = [NewValue]
WHERE [Condition that decides which rows to update]
```

> **Note:** The `WHERE` part of the command is optional. However, if it is left out, all the rows will be updated.

In this example, we’ll set the value of the `PhoneNumber` column to `Unspecified` in all rows:


Learn how to update and delete data from tables in a database.


Updating and Deleting Data from Tables

Learn how to update and delete data from tables in a database.

Before We Start

T-SQL Basics

Querying Multiple Tables

Grouping and Aggregation

Subqueries

T-SQL Fundamentals Assessment

Built-in Functions

T-SQL Programming Basics

Additional Programming Constructs

Course Comprehension Assessment

Conclusion

Updating and Deleting Data from Tables

The `UPDATE` command

Before We Start

T-SQL Basics

Querying Multiple Tables

Grouping and Aggregation

Subqueries

T-SQL Fundamentals Assessment

Built-in Functions

T-SQL Programming Basics

Additional Programming Constructs

Course Comprehension Assessment

Conclusion

Updating and Deleting Data from Tables

The UPDATE command

The `UPDATE` command