Microsoft SQL Server
- Getting started with Microsoft SQL Server
- Awesome Book
- Awesome Community
- Awesome Course
- Awesome Tutorial
- Awesome YouTube
- Advanced options
- Aggregate Functions
- Alias Names in Sql Server
- Analyzing a Query
- Backup and Restore Database
- Basic DDL Operations in MS SQL Server
- bcp (bulk copy program) Utility
- BULK Import
- CASE Statement
- CLUSTERED COLUMNSTORE
- COALESCE
- Common Language Runtime Integration
- Common Table Expressions
- Computed Columns
- Converting data types
- CREATE VIEW
- cross apply
- Cursors
- Data Types
- Database permissions
- Database Snapshots
- Dates
- DBCC
- DBMAIL
- Delimiting special characters and reserved words
- Drop Keyword
- Dynamic data masking
- Dynamic SQL
- Dynamic SQL Pivot
- Encryption
- Export data in txt file by using SQLCMD
- File Group
- Filestream
- FOR JSON
- FOR XML PATH
- Foreign Keys
- Full-Text Indexing
- Generating a range of dates
- GROUP BY
- IF...ELSE
- Index
- In-Memory OLTP (Hekaton)
- Insert
- INSERT INTO
- Installing SQL Server on Windows
- Isolation levels and locking
- Join
- JSON in Sql Server
- Last Inserted Identity
- Limit Result Set
- Logical Functions
- Managing Azure SQL Database
- MERGE
- Microsoft SQL Server Management Studio Shortcut Keys
- Migration
- Modify JSON text
- Move and copy data around tables
- Natively compiled modules (Hekaton)
- NULLs
- OPENJSON
- ORDER BY
- OVER Clause
- Pagination
- Parsename
- Partitioning
- Permissions and Security
- PHANTOM read
- PIVOT / UNPIVOT
- Primary Keys
- Add primary key to existing table
- Create table w/ composite key
- Create table w/ GUID primary key
- Create table w/ identity column as primary key
- Create table w/ natural key
- Delete primary key
- Privileges or Permissions
- Queries with JSON data
- Query Hints
- Query Store
- Querying results by page
- Ranking Functions
- Resource Governor
- Retrieve information about the database
- Retrieve Information about your Instance
- Row-level security
- Scheduled Task or Job
- Schemas
- SCOPE_IDENTITY()
- SELECT statement
- Sequences
- Service broker
- Sorting/ordering rows
- Spatial Data
- Split String function in Sql Server
- SQL Server Evolution through different versions (2000 - 2016)
- SQL Server Management Studio (SSMS)
- SQLCMD
- Stored Procedures
- Storing JSON in SQL tables
- String Aggregate functions in SQL Server
- String Functions
- Subqueries
- System database - TempDb
- Table Valued Parameters
- Temporal Tables
- The STUFF Function
- Transaction handling
- Transaction isolation levels
- Trigger
- TRY/CATCH
- UNION
- Use of TEMP Table
- User Defined Table Types
- Variables
- Views
- WHILE loop
- Window functions
- With Ties Option
Microsoft SQL Server Primary Keys Add primary key to existing table
Example
ALTER TABLE person
ADD CONSTRAINT pk_PersonSSN PRIMARY KEY (ssn)
Note, if the primary key column (in this case ssn) has more than one row with the same candidate key, the above statement will fail, as primary key values must be unique.
