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      Databases

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      CoursesIT & SoftwareDatabasesPostgreSQL Database
      • BASIC POSTGRESQL
        6
        • Lecture1.1
          PostgreSQL Brief History 30 min
        • Lecture1.2
          PostgreSQL Features 20 min
        • Lecture1.3
          PostgreSQL Monitoring Tools Overview 30 min
        • Lecture1.4
          PostgreSQL – Oracle Vs PostgreSQL 30 min
        • Lecture1.5
          PostgreSQL Data Types 30 min
        • Lecture1.6
          PostgreSQL Maximum Objects Size 30 min
      • VMWARE & POSTGRESQL INSTALLATION
        9
        • Lecture2.1
          Vmware Installation 30 min
        • Lecture2.2
          Creating Linux Virtual Machine 01 hour
        • Lecture2.3
          PostgreSQL Installation Types 30 min
        • Lecture2.4
          PostgreSQL GUI Installation 30 min
        • Lecture2.5
          PostgreSQL Text Mode Installation 30 min
        • Lecture2.6
          PostgreSQL Unattended Mode Installation 30 min
        • Lecture2.7
          Configure the network & Disk Partition 30 min
        • Lecture2.8
          How to install PostgreSQL10 On Linux Server ? 20 min
        • Lecture2.9
          PostgreSQL -11 Installation (rpm & source code) 30 min
      • POSTGRESQL DATABASE
        6
        • Lecture3.1
          Connect Postgres Server 10 min
        • Lecture3.2
          PostgreSQL startup / shutdown /restart the postgresql server 30 min
        • Lecture3.3
          PostgreSQL .bash_profile Set Up 30 min
        • Lecture3.4
          PostgreSQL Database Creation 30 min
        • Lecture3.5
          PostgreSQL Connect Database 30 min
        • Lecture3.6
          PostgreSQL Drop Database 30 min
      • POSTGRESQL TABLE
        16
        • Lecture4.1
          PostgreSQL Languages 30 min
        • Lecture4.2
          PostgreSQL Create Table 30 min
        • Lecture4.3
          PostgreSQL Select Table 30 min
        • Lecture4.4
          PostgreSQL Alter Table 30 min
        • Lecture4.5
          PostgreSQL Drop Table 30 min
        • Lecture4.6
          PostgreSQL Truncate Table 30 min
        • Lecture4.7
          PostgreSQL Rename 30 min
        • Lecture4.8
          PostgreSQL Comment 30 min
        • Lecture4.9
          PostgreSQL Insert 30 min
        • Lecture4.10
          PostgreSQL Update 30 min
        • Lecture4.11
          PostgreSQL Table Delete 30 min
        • Lecture4.12
          PostgreSQL Merge Table 30 min
        • Lecture4.13
          PostgreSQL UNION 30 min
        • Lecture4.14
          PostgreSQL UNION ALL 30 min
        • Lecture4.15
          PostgreSQL INTERSECT 30 min
        • Lecture4.16
          PostgreSQL DISTINCT 30 min
      • USER/OBJECTS PRIVILEGE AND ROLES ASIGNING
        3
        • Lecture5.1
          PostgreSQL Grant 30 min
        • Lecture5.2
          PostgreSQL Revoke 30 min
        • Lecture5.3
          Postgres user creation and restrict DDL statement & other database access 30 min
      • TRANSACTIONS - MVCC
        3
        • Lecture6.1
          PostgreSQL Commit 30 min
        • Lecture6.2
          PostgreSQL Rollback 30 min
        • Lecture6.3
          PostgreSQL Savepoint 30 min
      • POSTGRESQL USER/SCHEMA MANAGEMENT
        9
        • Lecture7.1
          PostgreSQL User Creation 30 min
        • Lecture7.2
          PostgreSQL User Creation Using Utility 30 min
        • Lecture7.3
          PostgreSQL Drop user 30 min
        • Lecture7.4
          PostgreSQL Drop User Using Utility 30 min
        • Lecture7.5
          PostgreSQL Password Changing and Views 30 min
        • Lecture7.6
          PostgreSQL Group/role 30 min
        • Lecture7.7
          Alter PostgreSQL User/Role/group 30 min
        • Lecture7.8
          PostgreSQL Schema 30 min
        • Lecture7.9
          PostgreSQL user creation and restrict DDL & database access 30 min
      • POSTGRESQL CONSTRAINTS
        6
        • Lecture8.1
          PostgreSQL Constraints 30 min
        • Lecture8.2
          PostgreSQL Primary Key 30 min
        • Lecture8.3
          PostgreSQL UNIQUE Constraint 30 min
        • Lecture8.4
          PostgreSQL CHECK Constraint 30 min
        • Lecture8.5
          PostgreSQL NOT NULL Constraint 30 min
        • Lecture8.6
          PostgreSQL Foreign Key 30 min
      • POSTGRESQL ADVANCE DATA TYPE
        5
        • Lecture9.1
          PostgreSQL DOMAIN Data Type 30 min
        • Lecture9.2
          PostgreSQL Alter Domain 30 min
        • Lecture9.3
          PostgreSQL Drop DOMAIN 30 min
        • Lecture9.4
          PostgreSQL Json Data Type 30 min
        • Lecture9.5
          PostgreSQL Sequence 30 min
      • POSTGRESQL VIEWS
        1
        • Lecture10.1
          How to Create PostgreSQL View 30 min
      • POSTGRESQL MONITORING OBJECT USUAGE/SIZE
        1
        • Lecture11.1
          How to Get Table Size, Database Size, Indexes Size, schema Size, Tablespace Size, column Size in PostgreSQL Database 30 min
      • POSTGRESQL DATABASE ARCHITECTURE
        4
        • Lecture12.1
          PostgreSQL Tablespace 30 min
        • Lecture12.2
          PostgreSQL UnderStanding Of Objects 30 min
        • Lecture12.3
          PostgreSQL Architecture 30 min
        • Lecture12.4
          PostgreSQL Query Flow 30 min
      • POSTGRESQL BACKUP AND RECOVERY
        13
        • Lecture13.1
          PostgreSQL Backup & Recovery Overview 30 min
        • Lecture13.2
          PostgreSQL Database Backup Tools – Pg_dump 30 min
        • Lecture13.3
          PostgreSQL Database Backup Tools – Pg_dumpall 30 min
        • Lecture13.4
          PostgreSQL Database Backup Tools – Pg_basebackup 30 min
        • Lecture13.5
          PostgreSQL COPY data From Text File 30 min
        • Lecture13.6
          PostgreSQL COPY data to Text File 30 min
        • Lecture13.7
          PostgreSQL Clone Table 20 min
        • Lecture13.8
          Postgres Database Schema Migration 30 min
        • Lecture13.9
          PostgreSQL Database clone/migration 30 min
        • Lecture13.10
          PostgreSQL Compress backup format 30 min
        • Lecture13.11
          PostgreSQL Archivelog 30 min
        • Lecture13.12
          PostgreSQL Point In Time Recovery 30 min
        • Lecture13.13
          Taking Backup On Postgres Slave (Standby) Server 30 min
      • POSTGRESQL PERFORMANCE TUNING
        5
        • Lecture14.1
          PostgreSQL Index 30 min
        • Lecture14.2
          PostgreSQL Reindex 30 min
        • Lecture14.3
          PostgreSQL PerformanceTuning 30 min
        • Lecture14.4
          Understanding Postgres VACUUM | VACUUM FULL | VACUUM ANALYZE 30 min
        • Lecture14.5
          Postgres Autovacuum Configuration/Setup 30 min
      • HIGH AVAILABILITY, LOAD BALANCING, AND REPLICATION
        11
        • Lecture15.1
          POSTGRESQL STREAMING REPLICATION 30 min
        • Lecture15.2
          SSL Streaming replication with PostgreSQL 10 30 min
        • Lecture15.3
          How to make Linux partition and configure the network on Redhat Linux7.3 30 min
        • Lecture15.4
          How To Fix Firewall Issues while connecting the other server? 30 min
        • Lecture15.5
          How to install the PostgreSQL10 On Linux ? 30 min
        • Lecture15.6
          How to Configure the cascade replication On PostgreSQL 10.3 ? 30 min
        • Lecture15.7
          How to add extra one slave an existing PostgreSQL cascade replication without down time ? 30 min
        • Lecture15.8
          PostgreSQL Switchover 30 min
        • Lecture15.9
          Postgres Failover 30 min
        • Lecture15.10
          Postgres Upgrade 30 min
        • Lecture15.11
          PostgreSQL Upgrade 9.5 to 11.3 . 30 min

        PostgreSQL Insert

        When a table is created, it contains no data. The first thing to do before a database can be of much use is to insert data. Data is conceptually inserted one row at a time. Of course you can also insert more than one row, but there is no way to insert less than one row at a time. Even if you know only some column values, a complete row must be created.
        Basic Synatx:

        INSERT INTO table [ ( column [, ...] ) ]
            { DEFAULT VALUES | VALUES ( { expression | DEFAULT } [, ...] ) | query }

        –To create a new table for use the INSERT command

        postgres=# CREATE TABLE products (
            product_no integer,
            name text,
            price numeric
        );

        –An example command to insert a row would be:

        postgres=# INSERT INTO products VALUES (1, 'Cheese', 100);
        INSERT 0 1

        –view the products table for successfully inserted or not

        postgres=# select * from products;
         product_no |  name  | price 
        ------------+--------+-------
                  1 | Cheese |   100
        (1 row)

        Both of the following commands have the same effect as the one below,Many users consider it good practice to always list the column names.

        postgres=#
        INSERT INTO products (product_no, name, price) VALUES (1, 'Cheese', 9.99);
        INSERT INTO products (name, price, product_no) VALUES ('Cheese', 9.99, 1);
        
        postgres=# select * from products;                                                   
         product_no |  name  | price 
        ------------+--------+-------
                  1 | Cheese |   100
                  1 | Cheese |  9.99
                  1 | Cheese |  9.99
        (3 rows

        –If you don’t have values for all the columns, you can omit some of them. In that case, the columns will be filled with their default values. For example,

        postgres=#
        INSERT INTO products (product_no, name) VALUES (2, 'bargar');
        INSERT INTO products VALUES (3, 'juice');

        — discribe the inserted values

        postgres=# select * from products;                                      
         product_no |  name  | price 
        ------------+--------+-------
                  1 | Cheese |   100
                  1 | Cheese |  9.99
                  1 | Cheese |  9.99
                  2 | bargar |      
                  3 | juice  |      
        (5 rows)

        –The second form is a PostgreSQL extension. It fills the columns from the left with as many values as are given, and the rest will be defaulted.For clarity, you can also request default values explicitly, for individual columns or for the entire row:

        INSERT INTO products (product_no, name, price) VALUES (4, 'cake', DEFAULT);
        INSERT INTO products DEFAULT VALUES;
        
        postgres=# select * from products;                                                    
         product_no |  name  | price 
        ------------+--------+-------
                  1 | Cheese |   100
                  1 | Cheese |  9.99
                  1 | Cheese |  9.99
                  2 | bargar |      
                  3 | juice  |      
                  4 | cake   |      
                    |        |

        –This example inserts some rows into table “products” from a table “Item” with the same column layout as Products:
        –item table list

        postgres=# select * from item;
         item_no |  name  | cost 
        ---------+--------+------
               1 | laptop |   20
               2 | pen    |   10
               3 | paper  |    8
        (3 rows)

        –Now insert into products from item table

        postgres=# INSERT INTO products SELECT * FROM Item WHERE cost > 8;
        INSERT 0 2
        
        postgres=# select * from products;                                
         product_no |  name  | price 
        ------------+--------+-------
                  1 | Cheese |   100
                  1 | Cheese |  9.99
                  1 | Cheese |  9.99
                  2 | bargar |      
                  3 | juice  |      
                  4 | cake   |      
                    |        |      
                  1 | laptop |    20
                  2 | pen    |    10
        (9 rows)
        postgres=# \d demo
                     Table "benz2.demo"
         Column |         Type          | Modifiers 
        --------+-----------------------+-----------
         id     | integer               | 
         name   | character varying(20) |

        –insert multiple values in a single command

        postgres=# INSERT INTO products (product_no, name, price) VALUES
            (5, 'nijam', 1000),
            (6, 'benz', 6000),
            (7, 'jam', 3456);
        
        postgres=# select * from products;                                
         product_no |  name  | price 
        ------------+--------+-------
                  1 | Cheese |   100
                  1 | Cheese |  9.99
                  1 | Cheese |  9.99
                  2 | bargar |      
                  3 | juice  |      
                  4 | cake   |      
                    |        |      
                  1 | laptop |    20
                  2 | pen    |    10
                  5 | nijam  |   1000   
                  6 | benz   |   6000
                  7 | jam    |   3456 
        
        (12 rows)

        To do “bulk loads”, that is, inserting a lot of data, take a look at the COPY command. It is not as flexible as the INSERT command

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