How to create a table in oracle 12c

Last Updated: May 11, 2021 | Author: Brenda-Townsend

How do you create a table from an existing table in Oracle?

Answer: To do this, the Oracle CREATE TABLE syntax is: CREATE TABLE new_table AS (SELECT * FROM old_table WHERE 1=2); For example: CREATE TABLE suppliers AS (SELECT * FROM companies WHERE 1=2);

How do you create a table example?

SQL CREATE TABLE Statement

CREATE TABLE table_name ( column1 datatype, column2 datatype, column3 datatype,
Example. CREATE TABLE Persons ( PersonID int, LastName varchar(255),
CREATE TABLE new_table_name AS. SELECT column1, column2, FROM existing_table_name. WHERE .;
Example. CREATE TABLE TestTable AS. SELECT customername, contactname.

How do I create a database table?

Create a new table in an existing database

Click File > Open, and click the database if it is listed under Recent. If not, select one of the browse options to locate the database.
In the Open dialog box, select the database that you want to open, and then click Open.
On the Create tab, in the Tables group, click Table.

How do you insert data into a table?

SQL INSERT – Inserting One or More Rows Into a Table

First, the table, which you want to insert a new row, in the INSERT INTO clause.
Second, a comma-separated list of columns in the table surrounded by parentheses.
Third, a comma-separated list of values surrounded by parentheses in the VALUES clause.

How do I display a table in SQL?

SQL command to list all tables in Oracle

Show all tables owned by the current user: SELECT table_name FROM user_tables; Code language: SQL (Structured Query Language) (sql)
Show all tables in the current database: SELECT table_name FROM dba_tables;
Show all tables that are accessible by the current user:

How can I see all tables in Oracle?

The easiest way to see all tables in the database is to query the all_tables view: SELECT owner, table_name FROM all_tables; This will show the owner (the user) and the name of the table. You don’t need any special privileges to see this view, but it only shows tables that are accessible to you.

How do I find a column in SQL?

Use this Query to search Tables & Views:

SELECT COL_NAME AS ‘Column_Name’, TAB_NAME AS ‘Table_Name’
FROM INFORMATION_SCHEMA.COLUMNS.
WHERE COL_NAME LIKE ‘%MyName%’
ORDER BY Table_Name, Column_Name;

How do I get a list of table names in SQL?

1 Answer

SELECT TABLE_NAME.
FROM INFORMATION_SCHEMA.TABLES.
WHERE TABLE_TYPE = ‘BASE TABLE‘ AND TABLE_SCHEMA=’dbName’

How do I choose a table name?

Using the Information Schema

SELECT TABLE_NAME FROM INFORMATION_SCHEMA. TABLES.
SELECT TABLE_NAME, COLUMN_NAME FROM INFORMATION_SCHEMA. COLUMNS.
SELECT COLUMN_NAME FROM INFORMATION_SCHEMA. COLUMNS WHERE TABLE_NAME = ‘Album’
IF EXISTS( SELECT * FROM INFORMATION_SCHEMA.
IF EXISTS( SELECT * FROM INFORMATION_SCHEMA.

How do I print a table name in select query?

The syntax to get all table names with the help of SELECT statement. mysql> use test; Database changed mysql> SELECT Table_name as TablesName from information_schema. tables where table_schema = ‘test’; Output with the name of the three tables.

How do I get a list of table names in MySQL?

How to find the name of all tables in MySQL database

mysql> SELECT table_name FROM information_schema.tables WHERE table_type = ‘base table‘ AND table_schema=’test’;
| employee |
| role |
| user |
| department |
| employee |
| role |
| user |

How can I get a list of all tables in MySQL?

To get a list of the tables in a MySQL database, use the mysql client tool to connect to the MySQL server and run the SHOW TABLES command. The optional FULL modifier will show the table type as a second output column.

How can you list all columns for a given table?

To list all columns in a table, we can use the SHOW command.

How do I get a list of databases in MySQL?

The most common way to get a list of the MySQL databases is by using the mysql client to connect to the MySQL server and run the SHOW DATABASES command. If you haven’t set a password for your MySQL user you can omit the -p switch.

How do I list all databases?

To view a list of databases on an instance of SQL Server

In Object Explorer, connect to an instance of the SQL Server Database Engine, and then expand that instance.
To see a list of all databases on the instance, expand Databases.

How do I list all databases in PostgreSQL?

Use \l or \l+ in psql to show all databases in the current PostgreSQL server. Use the SELECT statement to query data from the pg_database to get all databases.

Which command will return a list of triggers?

You can use the sys. triggers catalog view to return a list of triggers in a database in SQL Server. This view contains a row for each object that is a trigger, with a type of TR or TA.

How do I check my DB triggers?

How to View Triggers in SQL Server Management Studio

Table Scoped SQL Server DML Triggers. If we need to see the triggers on a specific table, we can use SSMS in the following way.
View Scoped SQL Server DML Triggers. Additionally, SSMS can be used to look at triggers that are scoped to views.
SQL Server Database Scoped DDL Triggers.
Server Scoped SQL Server DDL Triggers.

How do you display triggers?

To view database level triggers, Login to the server using SQL Server management studio and navigate to the database. Expand the database and navigate to Programmability -> Database Triggers. To view triggers at the server level, Login to Server using SSMS and navigate to Server Objects and then Triggers folder.

How do you find the triggers on a table?

Just go to your table name and expand the Triggers node to view a list of triggers associated with that table. Right click to modify your trigger. This way you can list out all the triggers associated with the given table.

What Cannot have a trigger associated with it?

Since triggers execute as part of a transaction, the following statements are not allowed in a trigger: All create commands, including create database, create table, create index, create procedure, create default, create rule, create trigger, and create view.