Skip to main content

Posts

INSERT data into table in PostgreSQL

The PostgreSQL INSERT INTO statement assures you to include a new row in the table. A row or multiple rows can be inserted at the time of the query results. Syntax to use of INSERT INTO keyword in PostgreSQLThe original sentence of INSERT INTO statement is as follows:
INSERT INTO TABLE_NAME (column1, column2, column3,...columnN) VALUES (value1, value2, value3,...valueN);

Here, column 1, column 2, columns are columns in the table in which you want to insert the data. The names of the target column can be listed in any order. The value given by the price segment or the query is linked to the left or right from a clear or built-in column list. If you are adding values ​​to all the columns in the table, you may not need to specify the column (s) in the SQL query. However, undo doubt that the order of values ​​is in the same table in the table. The SQL INSERT INTO syntax will be as follows-
INSERT INTO TABLE_NAME VALUES (value1,value2,value3,...valueN);
Output explanation when Inserted records…
Recent posts

Schema in PostgreSQL

Name of the Schema table is accumulation. A schema can also have thoughts, indexes, sequences, data types, operators, and functions. Schema corresponds to the directories at the operating system level, apart from that the schema cannot be nested. PostgreSQL statement Creation schema creates a schema. Syntax:Here is the original syntax of the CREATE schema: CREATE SCHEMA name; Syntax for schematic tableHere is the basic syntax for creating tables in schema: CREATE TABLE <schema name>.<Table Name>(Column1 int null, …); Illustration Let's see an illustration for creating schemas. Link to database testing and create a schema schema1 that is as follows – create schema schema1; The message "Building schema" indicates that the schema has been created successfully. Now, create a table in the above schema, which is as follows – create table schema1.table1(    ID   INTEGER  NOT NULL,    NAME CHARACTER VARYING (50)  NOT NULL,    DOJ  TIMESTAMP WITH TIME ZONE NOT NULL,    ADDRESS…

Drop Table in PostgreSQL

In this tutorial, you will understand how to use the DROP Table Statement to remove existing tables from the database in PostgreSQL.
PostgreSQL DROP table statement is used to define the table and remove all the data, index, rule, trigger and obstacles related to that table. DROP table removes tables from the database. Only its owner can demolish a table. To clear the table without any losses, use DELETE or TRUNCATE.
The DROP table removes any indexes, rules, triggers, and obstacles that are present for the target table. However, due to viewing the foreign-key block of a table or any other table, CASCADE should be specified. (CASCADE will completely remove a dependent approach, but in case of foreign-key it will only remove foreign-key constraints, not completely other tables.) You should be cautious while using this command because once the table is removed, all the available information in the table will be permanently lost. ParametersIF EXISTS: If the table does not exist, do not ente…