CREATE UNIQUE INDEX for Unique Values If you want to create indexes for unique values in a column, we use theCREATE UNIQUE INDEXconstraint. For example, -- create tableCREATETABLEColleges ( college_idINTPRIMARYKEY, college_codeVARCHAR(20)NOTNULL, college_nameVARCHAR(50) );-- create unique in...
“Why we use the primary key and clustered indexes on the same key column?” SQL Server adds a 4-byte uniquefier value for every duplicate index key on the non-unique clustered indexes. At first, we will create a very basic table, it will include only two-column and then we create...
SQL Indexes significantly carry out the process at a faster rate. If you want fast data retrieval from a database, SQL Indexes are an option. The concept of data indexing promises better performance for associated applications and queries. ...
SQL-DMO Examples: IndexesSQL-DMO will be removed in the next version of Microsoft SQL Server. Avoid using SQL-DMO feature in new development work, and plan to modify applications that use SQL-DMO. This example illustrates using SQL Distributed Management Objects (SQL-DMO) to create a unique,...
Indexesare lookup tables that help speed up database lookup functions. Reportsconsist of data retrieved from one or more tables, usually a subset of that data that is selected based on search criteria. Each column in a table corresponds to a category of data -- for example, customer name or...
If we want to create indexes for unique values in a column, we use theCREATE UNIQUE INDEXconstraint. For example, -- create unique indexCREATEUNIQUEINDEXcollege_indexONColleges(college_code); Run Code Here, the SQL command creates a unique index namedcollege_indexon theCollegestable using thecol...
In this post, I am sharing few examples of Table variable with Indexes. Please check the below samples: Define Table variable with Primary key and Unique key: 1 2 3 4 5 DECLARE @dbrnd TABLE ( ID INT PRIMARY KEY ,Name NVARCHAR(10) UNIQUE ...
the Create UNIQUE checkbox is disabled, since an index to enforce a primary key must be a unique index. However, creating new indexes not used to enforce primary keys will allow us to select the Create UNIQUE checkbox. We can also create a unique index using SQL with the following command...
The article covers how to use SQL CREATE INDEX statement to create a clustered as well as a non-clustered index. The article also shows the main differences between the two types of clustered indexes with the help of examples. Ben Richardson ...
If ALL is specified with PARTITION = <partition_number>, all indexes must be aligned. This means that they're partitioned based on equivalent partition functions. Using ALL with PARTITION causes all index partitions with the same <partition_number> to be rebuilt or reorganized. For more informat...