While working with spreadsheets, you can also export the data to a CSV file and use the data in other functions. This tutorial will demonstrate how to populate a table in a PostgreSQL database using a CSV file. Step-By-Step Guide to Import CSV File Data Into a Table in PostgreSQL Use ...
Basic SELECT Query to Retrieve Tables Inside INFORMATION_SCHEMA in PostgreSQLA very simple query to get all the tables inside this SCHEMA would be to write something like this.select * from information_schema.tables This would return a table like this.Output:...
In this post, we are going to see how to import Oracle data into PostgreSQL. If you have been using an Oracle database and now want to move to an open source alternative, then PostgreSQL is the best choice because not only is it free but it’s also a powerful RDBMS (relational datab...
InPostgreSQL, theALTER TABLEcommand performs different functionalities on a table. For example, theALTER TABLEstatement can add, drop, or update the table columns. Moreover, it allows us to add or remove constraints to a table. So, all in all, we can say that theALTER TABLEcommand is used...
PostgreSQL provides a RENAME COLUMN clause that is used with the collaboration of ALTER TABLE command to rename a column.
tablespace_name:Specify the name of the tablespace. If you do not specify the tablespace, the table will be created inpg_defaulttablespace PostgreSQL supports the following column constraints: PRIMARY KEY:The primary key identifies a record from the table uniquely. A PostgreSQL table can have only...
TheINSERT INTOstatement is the key to adding records to a table in PostgreSQL. Syntax and Usage The basic syntax is: INSERTINTOtable_name(column1,column2,column3,...) VALUES(value1,value2,value3,...); Simple Insertion Example Inserting a user into our previously created users table: ...
SUMMARY: This article discusses table partitions, the benefits of using them to increase performance, and the types of partitions that can be used in PostgreSQL. With huge data being stored in databases, performance and scaling are two main factors that are affected. As table size increases with...
How to Get the First Row per Group How to Use generate_series to Avoid Gaps In Data How to Do Type Casting How to Write a Common Table Expression How to Import a CSV using Copy How to Compare Two Values When One Is Null How to Use Coalesce How to Write a Case Statement How to Us...
\COPY:This is the command to copy the record to / from the .csv file. <table name>:Provides the table name where you want to import the data. FROM:Specifies that we are going to import from a file (we will also be usingTOin order to export it to a file at a later stage). ...