sql create a column code example

Example 1: alter table add column

ALTER TABLE table
ADD COLUMN column VARCHAR (255) NOT NULL AFTER column;

Example 2: sqlserver add column to table

ALTER TABLE dbo.doc_exa 
ADD column_b VARCHAR(20) NULL, 
	column_c INT NULL ;

Example 3: create column sql

ALTER TABLE table_name
ADD column_name datatype;

Example 4: how to make new column in sql

<?php
 
    echo str_replace("john", "jack", "hello i am john"); 
 
?>

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Sql Example

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