CREATE TABLE test ( arr int ARRAY, unique (arr) ); CREATE FUNCTION test_insert_trig_func() RETURNS trigger AS $$ BEGIN NEW.arr := ARRAY(SELECT unnest(NEW.arr) ORDER BY 1); RETURN NEW; END; $$ LANGUAGE plpgsql; CREATE TRIGGER test_insert_trig BEFORE INSERT ON test FOR EACH ROW EXE...
Replace the “name_of_table” with the desired table name and “name_of_constraint” with the constraint names that need to be removed. Example: Removing Unique Constraint From Multiple Columns Let’s use the DROP CONSTRAINT clause with the selected constraint name to remove it f...
问具有多个唯一约束的Postgres冲突处理EN不知道大家有没有遇到这么一种业务场景，在业务中有个唯一约束A，...
WITH NOCHECK字段。 我们给test002数据添加约束 ALTER TABLE test002 add constraint CK_test002_phone check(phone like '[1][3-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]')--抛出错误信息 消息 547,级别 16,状态 0,第 1 行 ALTER TABLE 语句与 CHECK 约束"CK_test002_pho...
问重复的键值违反唯一约束-尝试从dask数据帧创建sql表时出现postgres错误EN在创建销售订单时，保存之后，...
[CONSTRAINT<constraint_name>]{UNIQUE(<column_name>[,...])[USINGINDEX[<create_index_statement>]TABLESPACE<tablespace>]|PRIMARYKEY(<column_name>[,...])[USINGINDEX[<create_index_statement>]TABLESPACE<tablespace>]|CHECK(<expression>)|FOREIGNKEY(<column_name>[,...])REFERENCES<reftab...
Executing (default): CREATE TABLE IF NOT EXISTS "services" ("id" SERIAL , "asset_type" VARCHAR(255) NOT NULL REFERENCES "assets" ("id") ON DELETE SET NULL ON UPDATE SET NULL, "service_type" VARCHAR(255) NOT NULL, "createdAt" TIMESTAMP WITH TIME ZONE NOT NULL, "updatedAt" TIMESTAMP...
幸运的是,你可以先使用CREATE UNIQUE INDEX CONCURRENTLY完成所有繁重的工作,然后使用唯一索引作为主键,这是一种快速操作。 CREATE UNIQUE INDEX CONCURRENTLY items_pk ON items (id); -- 会很长,但不会阻塞查询 ALTER TABLE items ADD CONSTRAINT items_pk PRIMARY KEY USING INDEX items_pk; -- 会阻塞查询,但...
IntegrityError: (psycopg2.IntegrityError) duplicate key value violates unique constraint "pg_type_typname_nsp_index" DETAIL: Key (typname, typnamespace)=(test1, 2200) already exists. [SQL: '\nCREATE TABLE test1 (\n\t"A" BIGINT, \n\t"B" BIGINT, \n\t"C" BIGINT, \n\t"D" BIGINT,...
create database testdb; 1. 删除数据库 postgres=# drop database testdb; DROP DATABASE postgres=# 1. 2. 3. 4. 创建表 创建表之前要连接指定的数据库 \c test; CREATE TABLE table_name( column1 datatype, column2 datatype, column3 datatype, ...