“SQL Berechnete Spalte hinzufügen” Code-Antworten

SQL Berechnete Spalte hinzufügen

-- MySQL / Oracle:
ALTER TABLE table_name ADD double_count NUMBER(10, 2)
    GENERATED ALWAYS AS (account * 2) VIRTUAL;
    
-- SQL Server
ALTER TABLE table_name ADD [double_count] AS (account * 2);