ALTERTABLEpublic.pro_salary_quotaADDIFNOTEXISTSweigh_warning_thresholdnumeric(20,2)NULL; COMMENTONCOLUMNpublic.pro_factory.weigh_warning_thresholdIS'过磅预警阈值'; 1.3、表删除字段 ALTERTABLEpublic.pro_salary_quotaDROPIFEXISTStare; 1.4、表修改字段不可为null ALTERTABLEpublic.materiel_raw_store_subalterin...
altertablepublic.t_module_xxxdropconstraintifEXISTSunique_xxxx;altertablepublic.t_module_xxxaddconstraintunique_xxxxunique(col1,col2); 建表语句# -- postgresql建议使用小写droptableifexistspublic.t_module_xxx;dropsequence ifexistsseq_t_module_xxx;-- 创建序列createsequence seq_t_module_xxx increment1m...
customerName char(10) not null, customerBalance money not null ) go /*--添加约束:根据银行规定,账户余额不能低于1元,否则视于销户---*/ alter table userInfo add constraint ck_userInfo_customerBalance check(customerBalance>=1) go/*---插入测试数据---*/ insert userInfo(customerName,customerBalance...
constraint fk_emp3_dept(外键名字) foreign key (colunm) references dept(另一张表的名字)(column) #十六、非空约束、唯一约束、默认值约束定义和作用(数据的完整性exp:邮箱不为空) 虽然可以在应用,但是也可以在数据库上加上保险 非空约束:在约定的数据表的属性上加上not null 唯一约束:和主键有点区别,uniq...
create table if not exists distlock_history(id serial primary key,lockname text not null,owner text not null,ts timestamptz not null,expired_time interval not null); CREATE OR REPLACE FUNCTION distlock_log_update() RETURNS trigger AS $$ BEGIN IF TG_OP = 'INSERT' or NEW.owner <> OLD...
1 ALTER TABLE "public"."tableName" ALTER COLUMN "code" SET NOT NULL; 10.设置唯一键 1 alter table "public"."tableName" add constraint "unique_code_sid" unique ("code"); 原文出处:https://www.cnblogs.com/baoshan/p/10003418.html
2023-07-02来自湖北 韩琦: 太棒了,我愿称之为史上最强mysql迁移到pgsql的教程,没有之一! 2023-07-05来自湖北 itemcf: Hello blogger, I see that your articles are all very good. Can you reprint the articles on your homepage to the OpenSNN open source community? I will mark the source and ...
CREATE TABLE IF NOT EXISTS test ( id integer NOT NULL DEFAULT nextval('threshold_retry.threshold_details_id_seq'::regclass), component_type text COLLATE pg_catalog."default" NOT NULL, component_names text[] COLLATE pg_catalog."default" NOT NULL, CONSTRAINT test_pk PRIMARY KEY (id) ) 要...
DROP TABLE IF EXISTS "public"."BASE_User"; CREATE TABLE "public"."BASE_User" ( "Id" varchar(50) COLLATE "pg_catalog"."default" NOT NULL, "CreateTime" timestamp(6) NOT NULL ) ; COMMENT ON COLUMN "public"."BASE_User"."Id" IS 'GUId主键'; COMMENT ON COLUMN "public"."BASE_User...
create table if not exists distlock(lockname text primary key,owner text not null,ts timestamptz not null,expired_time interval not null); 可选地,可以创建锁的历史表,每次锁的owner变更(主从角色切换)都会记录到历史表(distlock_history)中。