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SQL Table


SQL Table

1) SQL - Create a table

To create a table in the selected database.


Syntax -

create table table_name (
column1 datatype(range),
column2 datatype(range),
column3 datatype(range),

sql create a table


2) SQL - Show tables

To show all tables in the selected database.


Syntax -

show tables;

sql show table


3) SQL -Describe table name

To show detail about any table in selected database like number of fields, key, extra (auto-increment), data type, null etc.


Syntax -

desc table_name ;

sql describe table name


4) SQL - Delete a table

To delete a table in the selected database.


Syntax -

drop table  table_name ;

sql delete a table


5) SQL- Insert data into a table

To insert data in a table.


Syntax -

insert into table_name ( coloumn1_name, coloumn2_name, coloumn3_name, ………….. ) ;
values ( coloumn1_value, coloumn2_value, coloumn3_value, ……….);

sql inser data into a table


Note:- varchar value must be in the ‘…..’  or   “…..” when inserting data.


We can also insert value by below code

Syntax -

insert into table_name;
values ( coloumn1_value, coloumn2_value, coloumn3_value, ……….);

sql insert data into a table


6) SQL - Show data of table

To show inserted data in the table which we created in the database.


Syntax -

select * from table_name ;

sql show data of table


7) SQL- Add column in a table

Using this, we can add a column in any table.


Syntax -

alter table table_name add column_name data_type(range) ;

sql add a column from table


8) SQL - Delete a column from the table

Using this we can delete any column from a table.


Syntax -

alter table table_name drop column column_name;

sql delete a column from table



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