CREATE TABLE IF NOT EXISTS users( Id serial PRIMARY KEY, Name VARCHAR(10) NOT NULL, Code VARCHAR(20) NOT NULL, Ucode VARCHAR(20) NOT NULL, CreatedAt timestamptz DEFAULT current_timestamp, UpdatedAt timestamptz DEFAULT current_timestamp ); ALTER TABLE users ADD CONSTRAINT users_Code_Ucode_...
ADD table_constraint [ NOT VALID ] ADD table_constraint_using_index ALTER CONSTRAINT constraint_name [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] VALIDATE CONSTRAINT constraint_name DROP CONSTRAINT [ IF EXISTS ] constraint_name [ RESTRICT | CASCADE ] DISABLE TRIGGER ...
drop index if exists "t_user_pkey"; alter table "t_user" add constraint "t_user_pkey" primary key ("ID"); 根据已有表结构创建表 create table if not exists 新表 (like 旧表 including indexes including comments including defaults); 删除表 drop table if exists "t_template" cascade; 查询注...
如果正在使用数据库schema迁移工具,例如sqitch、liquibase、flyway或嵌入在你的框架中的工具(rubyonrails、django、yii等),你可能会在ci/cd管道中测试迁移主干.如果开始测试链do-undo-do(应用更改、还原它并再次重新应用),它可以帮助检测一些不希望使用的if[not]exists.当然,让所有环境中的schema保持最新并尊重所有观察到...
CREATE TABLE IF NOT EXISTS t_trigger ( id int8 not null, action_params text, bindings varchar(200), PRIMARY KEY (id) ); INSERT INTO t_trigger VALUES ('10002955', '{"className":"ActionParamsOfRpc","service":"NapDeviceService_PullHitCountConfig","params":{"deviceType":"sky_firewall",...
ALTER TABLE employees DROP COLUMN IF EXISTS notes;增加约束为表增加约束可以使用ALTER TABLE语句:ALTER TABLE table_name ADD table_constraint;ALTER TABLE table_name ALTER COLUMN column_name SET DEFAULT expression;ALTER TABLE table_name ALTER COLUMN column_name SET NOT NULL;...
ALTER DOMAIN name { SET DEFAULT expression | DROP DEFAULT } ALTER DOMAIN name { SET | DROP } NOT NULL ALTER DOMAIN name ADD domain_constraint ALTER DOMAIN name DROP CONSTRAINT constraint_name [ RESTRICT | CASCADE ] ALTER DOMAIN name OWNER TO new_owner ...
drop indexifexists"t_user_pkey";alter table"t_user"add constraint"t_user_pkey"primarykey("ID"); 根据已有表结构创建表 代码语言:javascript 复制 create tableifnot exists新表(like 旧表 including indexes including comments including defaults); ...
ALTERDOMAINname{SETDEFAULTexpression|DROPDEFAULT}ALTERDOMAINname{SET|DROP}NOTNULLALTERDOMAINnameADDdomain_constraintALTERDOMAINnameDROPCONSTRAINTconstraint_name[RESTRICT|CASCADE]ALTERDOMAINnameOWNERTOnew_owner 复制 ALTER FUNCTION 修改一个函数的定义。 ALTERFUNCTIONname([type[,...]])RENAMETOnew_nameALTERFUNCTION...
# Re-commenting a setting is NOT sufficient to revert it to the default value; # you need to reload the server. # # This file is read on server startup and when the server receives a SIGHUP # signal. If you edit the file on a running system, you have to SIGHUP the # server ...