How To Create a New Table

Q

How To Create a New Table? - Oracle DBA FAQ - Understanding SQL DDL Statements

✍: FYIcenter.com

A

If you want to create a new table in your own schema, you can log into the server with your account, and use the CREATE TABLE statement. The following script shows you how to create a table:

>.\bin\sqlplus /nolog

SQL> connect HR/fyicenter
Connected.

SQL> CREATE TABLE tip (id NUMBER(5) PRIMARY KEY,
  2    subject VARCHAR(80) NOT NULL,
  3    description VARCHAR(256) NOT NULL,
  4    create_date DATE DEFAULT (sysdate));

Table created.

This scripts creates a testing table called "tip" with 4 columns in the schema associated with the log in account "HR".

2007-04-22, 5038👍, 0💬

What Are DDL Statements
What Are DDL Statements? - Oracle DBA FAQ - Understanding SQL DDL Statements DDL (Data Definition Language) statements are statements to create and manage data objects in the database. The are 3 primary DDL statements: CREATE - Creating a new database object. ALTER - Altering the definition of an ex... 2007-04-22, 5437👍, 0💬

How To Create a New Table by Selecting Rows from Another Table
How To Create a New Table by Selecting Rows from Another Table? - Oracle DBA FAQ - Understanding SQL DDL Statements Let's say you have a table with many data rows, now you want to create a backup copy of this table of all rows or a subset of them, you can use the CREATE TABLE...AS SELECT statement t... 2007-04-22, 5419👍, 0💬

How To Use IN Conditions
How To Use IN Conditions? - Oracle DBA FAQ - Understanding SQL Basics An IN condition is single value again a list of values. It returns TRUE, if the specified value is in the list. Otherwise, it returns FALSE. Some examples are given in the script below: SELECT CASE WHEN 3 IN (1,2,3,5) THEN 'TRUE' ... 2007-04-23, 5379👍, 0💬

How To Use Regular Expression in Pattern Match Conditions
How To Use Regular Expression in Pattern Match Conditions? - Oracle DBA FAQ - Understanding SQL Basics If you have a pattern that is too complex for LIKE to handle, you can use the regular expression pattern patch function: REGEXP_LIKE(). The following script provides you some good examples: SELECT ... 2007-04-22, 5360👍, 0💬

How To Add a New Column to an Existing Table
How To Add a New Column to an Existing Table? - Oracle DBA FAQ - Understanding SQL DDL Statements If you have an existing table with existing data rows, and want to add a new column to that table, you can use the ALTER TABLE ... ADD statement to do this. Here is an example script: SQL> connect HR/fy... 2007-04-22, 5250👍, 0💬

How To Delete a Column in an Existing Table
How To Delete a Column in an Existing Table? - Oracle DBA FAQ - Understanding SQL DDL Statements If you have an existing column in a table and you need that column any more, you can delete it with ALTER TABLE ... DROP COLUMN statement. Here is an example SQL script: SQL> CREATE TABLE emp_dept_90 2 A... 2007-04-22, 5150👍, 0💬

How To Create a New Table
How To Create a New Table? - Oracle DBA FAQ - Understanding SQL DDL Statements If you want to create a new table in your own schema, you can log into the server with your account, and use the CREATE TABLE statement. The following script shows you how to create a table: >.\bin\sqlplus /nolog SQL> con... 2007-04-22, 5039👍, 0💬

How To Create a Table Index
How To Create a Table Index? - Oracle DBA FAQ - Understanding SQL DDL Statements If you have a table with a lots of rows, and you know that one of the columns will be used often a search criteria, you can add an index for that column to in improve the search performance. To add an index, you can use... 2007-04-22, 5009👍, 0💬

How To Use LIKE Conditions
How To Use LIKE Conditions? - Oracle DBA FAQ - Understanding SQL Basics LIKE condition is also called pattern patch. There 3 main rules on using LIKE condition: '_' is used in the pattern to match any one character. '%' is used in the pattern to match any zero or more characters. ESCAPE clause is us... 2007-04-23, 4953👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.