Query to Display Primary Keys
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Structured Query Language, abbreviated as SQL, is a domain-specific language used in programming and designed for managing data held in a relational database management system, or for stream processing in a relational data stream management system.
An good developer must be familiar with a few commands in SQL because it is such a strong development tool. The SQL queries listed below are important for coding and optimization. Almost every system that interacts with a SQL database will be affected by each query in the SQL tutorial.
Query to Display Primary Keys
A primary key uniquely identifies all values within a table. A primary key imposes a NOT NULL restriction and a unique constraint in one declaration. In other words, it prevents various rows from having similar values or sequences of columns. It doesn’t allow null values. The primary key can be defined on a single column or the combination of two columns in a table. It is responsible for all the relationships between the tables. The following SQL query lists all the fields in a table’s primary key.
SELECT * from Sys.Objects WHERE Type='PK'
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