修改表名：alter table table_name rename new_table_name;添加字段：alter table table_name add column_name type_name constraint_name 修改字段：alter table table_name modify column_name type_name constraint_name 刪除字段：alter table table_name drop column_name約束：主鍵：單主鍵添加：create table table_name(column primary key,...);alter table table_name add constraint pk_name primary key (column);多主鍵添加：create table table_name(column ...，primary key （column...）);alter table table_name add constraint pk_name primary key (column...);主鍵刪除：alter table table_name drop primary key;外鍵：外鍵創建：create table table_name(column ...，constraint fk_name foreign key (column) references table_name(column));alter table productinfo add constraint fk_name foreign key (column) references table_name(column);外鍵刪除：alter table table_name drop foreign key fk_name;默認：創建：create table table_name(column default value,...);alter table table_name alter column set default value;刪除：alter table table_name alter column drop default;非空：創建：create table table_name(column NOT NULL,...);alter table table_name modify/alter column NOT NULL;檢查：創建：create table table_name(column check(expression),...);create table table_name(column ...,[constraint constraint_name]check(expression));alter table table_name add constraint check_name check(expression);唯一：創建：create table table_name(column unique,...);create table table_name(column ...,[constraint constraint_name]unique(column)...);create table table_name(column ...,[constraint constraint_name]unique(column...));alter table table_name add constraint unique_name unique(column...);刪除：drop index unique_name on table_name;

　　

轉載于:https://www.cnblogs.com/navysummer/p/10862940.html

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