db2 表添加删除字段

ALTER TABLE TBNAME ADD COLUMN COLUMNNAME COLUMNTYPE COLUMNDEFAULTVALUE VALUE;
EG:

ALTER TABLE CIBCMS. T_TOL_CUST_VALIDADDR ADD COLUMN NVIPCORE_CFM_CNT BIGINT DEFAULT 0;

给表添加说明：

COMMENT ON COLUMN CIBCMS.T_TOL_CUST_VALIDADDR.NVIPCORE_CFM_CNT IS '已确认非VIP核心客户数量'

ALTER TABLE TBNAME DROPE COLUMN COLUMNNAME;