Answers for "alter data sql"

SQL
10

sql update from select

UPDATE YourTable 
SET Col1 = OtherTable.Col1, 
    Col2 = OtherTable.Col2 
FROM (
    SELECT ID, Col1, Col2 
    FROM other_table) AS OtherTable
WHERE 
    OtherTable.ID = YourTable.ID
Posted by: Guest on April-02-2020
0

sql alter table

-- With check if field already exists

IF NOT EXISTS(SELECT 1 FROM sys.columns 
          WHERE Name = N'Email'
          AND Object_ID = Object_ID(N'dbo.Customers'))
BEGIN    
	ALTER TABLE Customers
    ADD Email varchar(255);
END
Posted by: Guest on November-26-2020
0

ALTER IN SQL

ALTER TABLE DataFlair
ADD emp_id varchar(5);
Posted by: Guest on July-18-2021

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