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joplin notion extension/Web Development/sql/postgresql syntax.md

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+postgresql syntax
+
+- Creating table
+  ```sql
+ 	DROP TABLE IF EXISTS COMPANY;
+	CREATE TABLE COMPANY(
+	   ID INT PRIMARY KEY      NOT NULL,
+	   NAME           TEXT    NOT NULL,
+	   AGE            INT     NOT NULL,
+	   ADDRESS        CHAR(50),
+	   SALARY         REAL
+	);
+  ```
+  For auto increment
+    ```sql
+	CREATE TABLE COMPANY(
+	   ID SERIAL PRIMARY KEY      NOT NULL,
+	   NAME           TEXT    NOT NULL,
+	   AGE            INT     NOT NULL,
+	   ADDRESS        CHAR(50),
+	   SALARY         REAL
+	);
+  ```
+ 
+  `SERIAL` for auto increment
+- to load postgresql database
+    
+    ```bash
+    psql -U postgres smart-brain
+    ```
+    
+    Here postgres is owner name and smart-brain is name of data base. It will prompt for password which is U2FsdGVkX1/k+uOTLs4gSYVmxYAJEQybNVGnxIQVHyg=. Refer to 
+    
+    [Web development](../../../undefined)
+    
+    for decrypting it.
+    
+    To load postgresql without database:
+    
+    `psql -U postgres`
+    
+    To create database:
+    
+    `createdb mydb -U postgres`
+    
+    or
+    
+    ```bash
+    psql -U postgres
+    create database mydb;
+    ```
+    
+    To get list of database:
+    
+    `\l`
+    
+    To connect to database when login as user
+    
+    `\connect dbname`
+    
+    `\q`: To quit
+	- List tables, views and sequences
+	  `\d`
+	- Describe tables
+	  `\d <table_name>`