


What is the difference between syntax for adding columns in different database systems
Apr 09, 2025 pm 02:15 PM不同數(shù)據(jù)庫系統(tǒng)添加列的語法為:MySQL:ALTER TABLE table_name ADD column_name data_type;PostgreSQL:ALTER TABLE table_name ADD COLUMN column_name data_type;Oracle:ALTER TABLE table_name ADD (column_name data_type);SQL Server:ALTER TABLE table_name ADD column_name data_
不同數(shù)據(jù)庫系統(tǒng)添加列的語法
MySQL
ALTER TABLE table_name ADD column_name data_type;
PostgreSQL
ALTER TABLE table_name ADD COLUMN column_name data_type;
Oracle
ALTER TABLE table_name ADD (column_name data_type);
SQL Server
ALTER TABLE table_name ADD column_name data_type;
SQLite
ALTER TABLE table_name ADD COLUMN column_name data_type;
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