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Question: 1. How to create a new table?
2. How to insert another column into the table?

Answer: create table employee(name varchar2(10),id number(10),mobileno number(10));



Category SQL Interview Questions & Answers - Exam Mode / Learning Mode
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Question: 1. How to create a new table?
2. How to insert another column into the table?

Answer:

create table employee(name varchar2(10),id number(10),mobileno number(10)); Source: CoolInterview.com

Answered by: pavani | Date: 10/26/2007 | Contact pavani Contact pavani

Inserting a new Column into a table:

General Syntax:

insert into tablename(columnname datatype);

Example:

insert into employee(salary number(10));
Source: CoolInterview.com

Answered by: Satheesh | Date: 11/10/2007 | Contact Satheesh Contact Satheesh

Inserting column:

ALTER TABLE <tablename> ADD <columnname> <column_definition>

eg.

ALTER TABLE emp ADD empname VARCHAR(20) NULL

Source: CoolInterview.com

Answered by: Ashish Kapoor | Date: 11/20/2007 | Contact Ashish Kapoor Contact Ashish Kapoor

We Cant able to insert a new column through INSERT COMMAND.

INSERT Command is only used for Inserting the Values into the table for all the columns.

For Inserting one Column or More than One we have to use ALTER COMMAND.

The Syntax is

ALTER TABLE TABLE NAME ADD COLUMN DATATYPE;

For inserting More than one column we have to use (,) in between the columns.

ALTER TABLE TABLE NAME ADD (COLUMN DATATYPE,COLUMN DATATYPE); Source: CoolInterview.com

Answered by: NithyaSanthanam | Date: 11/21/2007 | Contact NithyaSanthanam Contact NithyaSanthanam

alter table tablename add(columnname datatype(size)); Source: CoolInterview.com

Answered by: Monika | Date: 1/14/2008 | Contact Monika Contact Monika

Insert command only inserting the values into a table but cant able to insert column through insert command.
Through alter command we can add a new column into a table.
SYNTAX:
ALTER TABLE<TABLE-NAME> ADD COLUMN-NAME DATATYPE;
EXAMPLE:
ALTER TABLE EMPLOYEE ADD DESIGNATION VARCHAR2(10); Source: CoolInterview.com

Answered by: praveen | Date: 1/24/2008 | Contact praveen Contact praveen

1.create table emp(ename varchar2(29),empno number,joindate date );
2.alter table emp add column columname datatype(size) default string ; Source: CoolInterview.com

Answered by: chandrabhanu agrawalla | Date: 3/11/2008 | Contact chandrabhanu agrawalla Contact chandrabhanu agrawalla

1)create table <table name>
(
col name datatype(size),
col name datatype(size),



col name datatype(size)
);
2) alter table <table name>
add( colname data type(size)); Source: CoolInterview.com

Answered by: vsseshasai | Date: 5/8/2008 | Contact vsseshasai Contact vsseshasai

SQL> create table new(name char(10), salary number(7,2));

Table created.

SQL> alter table new add(roll number(10));

Table altered.

SQL> desc new
Name Null? Type
----------------------------------------- -------- ----------------------------
NAME CHAR(10)
SALARY NUMBER(7,2)
ROLL NUMBER(10) Source: CoolInterview.com

Answered by: Satyam | Date: 5/15/2008 | Contact Satyam Contact Satyam

Create table:-

CREATE TABLE <table_name>
(<column 1> <data_type_for_column_1>,
<column 2> <data_type_for_column_2>,
... )

Insert column:-

ALTER TABLE table_name
ADD column_name datatype Source: CoolInterview.com

Answered by: modi | Date: 12/22/2008 | Contact modi Contact modi

create table <tablename)(column1 datatype,column2 datatype.......columnn)
to add a new column syntax is
alter table <tablename) add(columnname datatype) Source: CoolInterview.com

Answered by: praneeth | Date: 12/29/2008 | Contact praneeth Contact praneeth


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