#使用表级约束语法为java_teacher_name和java_teacher_pass建立联合foreign key constraint student_table3_ibfk_1 foreign key(java_teacher_name,java_teacher_pass) references teacher_table3(teacher_name,teacher_pass) ); #删除foreign key alter table student_table3 drop foreign key student_table3_ibfk_1...
docker部署的postgres服务端,宿主机安装postgres客户端,使用命令进行备份恢复2.数据库备份: 使用pg_dump 命令来备份数据库,并将其压缩为 .sql.gz 或者.tar.gz 格式。 在备份时会包含创建数据库的语句。3.备份清理: 使用find命令清理超过指定天数(RETENTION_DAYS)的旧备份文件。4.恢复交互式: 列出备份目录中的备份...
create table boy_girl( id int not null primary key, boy_id int not null, girl_id int not null, constraint fk_boy foreign key (boy_id) references boy(id), constraint fk_girl foreign key (girl_id) references girl(id) ); -- 创建表之后添加外键 alter table boy_girl add constraint fk_...
-- 外键对应主表的主键 数据类型要一样 CONSTRAINT tab_tab1_id -- 外键名称 FOREIGN KEY...KEY , -- 主键id 也是连接tab表的外键 age INT ); -- 删除外键约束 ALTER TABLE tab -- 表名 DROP FOREIGN KEY ...
enable/disable fk的写法不能用了。。。 网上搜了一下,ms只能用先删除外键,然后重新创建的方式,memo一下。 alter table xxxxx drop constraint xxxx_fk; alter table xxxxx add constraint xxxx_fk foreign key (column1) references yyyyyy (column1);...
exports.up = function(knex) { return knex.schema.alterTable('your_table_name', function(table) { table.dropForeign('foreign_key_column'); knex.raw('ALTER TABLE your_table_name DROP CONSTRAINT your_constraint_name'); }); }; 其中,your_table_name是你要修改的表名,foreign_key_column是包含...
altertableordersdropconstraintorders_goods_id_fkey; AI代码助手复制代码 (4). 添加唯一约束 altertablegoodsaddconstraintunique_goods_sidunique(sid); AI代码助手复制代码 (5). 删除默认值 altertablegoodsaltercolumnsiddropdefault; AI代码助手复制代码
Executing (default): DROP TABLE IF EXISTS "assets" CASCADE; Executing (default): CREATE TABLE IF NOT EXISTS "assets" ("id" SERIAL , "asset_category" VARCHAR(255) NOT NULL, "asset_type" VARCHAR(255) NOT NULL, "asset_description" VARCHAR(255) NOT NULL, "createdAt" TIMESTAMP WITH TIME ...
DROP EVENT TRIGGER Y Y DDL DROP EXTENSION Y Y DDL DROP FOREIGN DATA WRAPPER Y Y DDL DROP FOREIGN TABLE Y Y DDL DROP FUNCTION Y Y DDL DROP INDEX Y Y DDL DROP LANGUAGE Y Y DDL DROP MATERIALIZED VIEW Y N N DROP OPERATOR Y Y DDL DROP OPERATOR CLASS Y Y DDL DROP OPERATOR FAMILY Y...
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