Category: Indexes

In this section, we are going to understand the creation of the PostgreSQL multicolumn Index, and these indexes are specified on more than one column of a table. What is PostgreSQL Multi-column Indexes? We can create an index on a various column of a table; such indexes are known as a multi-column index. In other words, we can…

In this section, we are going to understand the working of the PostgreSQL REINDEX command, which is used to recreate multiple indexes and see the difference between the REINDEX command, drop and create index command. What is the PostgreSQL REINDEX command? In reality, the PostgreSQL index can be altered and no longer having valid data because of software issues or hardware…

In this section, we are going to understand the working of the PostgreSQL Partial Index, which is used to enhance the performance of the command by reducing the index size. What is PostgreSQL partial index? Till now, we have understood how to add values of various columns to an index. The Partial index is the next command, which is…

In this section, we are going to understand the control of indexes on expression, which helps us to enhance the performance of the commands that also include the expressions. And also, see the example of PostgreSQL index on expression. What is the PostgreSQL index on expression? Generally, the create an index refers to one or various columns of a table. But we…

In this section, we are going to understand the working of the UNIQUE Index, which is used to make sure the individuality of data in various columns. The examples of the PostgreSQL Unique Index, and see example of using single and multi-Column PostgreSQL UNIQUE index. What is PostgreSQL Unique Index? In PostgreSQL, the UNIQUE index is used to ensure data value’s uniqueness in one…

In this section, we are going to understand the working of the List Indexes from a PostgreSQL Database with the help of SQL Shell (PSQL) and pg_indexes view. And the examples of the Listing the indexes using psql and pg_indexes view. What are PostgreSQL List Indexes? In PostgreSQL, we do not have a command like SHOW INDEXES for listing the indexes data of a database or a table.…

In this section, we are going to understand the working of the PostgreSQL Drop Index and the examples of the Drop index command. Why we use the PostgreSQL Drop index command? In PostgreSQL, the Drop index command is used to remove the existing index. And if we drop an Index, it will improve the performance. Syntax of PostgreSQL Drop Index command The syntax…

In this section, we are going to understand the working of the PostgreSQL Create Index and the examples of the Create indexes command. Why we use the PostgreSQL Create indexes command? In PostgreSQL, the Create indexes command is used to create a new index by defining the index name and table or column name on which the index is created. Syntax of PostgreSQL Create Indexes command The…

In this section, we are going to understand the working of PostgreSQL indexes more efficiently, why we need to use the indexes, features of PostgreSQL indexes, a different type of Indexes, and various commands which are performed under the PostgreSQL Indexes section. What are PostgreSQL Indexes? In PostgreSQL, Indexes is the special tool used to enhance the retrieval of data…