二、解决方案 (1)PostgresSQL INSERT INTO test_tab(name,sex,address,lastEndTime,createTime) SELECT'a','b','c',1,1FROM (select1) tmp WHERE NOT EXISTS (Select1FROM test_tabwherename ='0') (2)MySQL(使用系统临时表DUAL) INSERT INTO `test_tab`(`name`,`age`,`addresss`) SELECT'aa',2...
I would really like to be able to insert into that view as though it were a physical table, including a constraint error if the user-provided item ID already exists. I believe I need to create a trigger function, but I'm not sure what the query would look like to return a constraint...
INSERT Data into temp table. INSERTINTOtemp_data(name, name_slug, status); Add any indexes to the temp table. Do main table insert. INSERTINTOhundred(name, name_slug, status)SELECTDISTINCTname, name_slug, statusFROMhundredWHERENOTEXISTS(SELECT'X'FROMtemp_dataWHEREtemp_data.name=hundred.nameAN...
INSERTINTOWHERENOTEXISTS ⼀、问题 Postgresql中⽆则插⼊的使⽤⽅法INSERT INTO WHERE NOT EXISTS，⽤法请参考样例。⼆、解决⽅案 （1）PostgresSQL INSERT INTO test_tab(name,sex,address,lastEndTime,createTime)SELECT 'a','b','c',1,1 FROM (select1) tmp WHERE NOT EXISTS (Select ...
But what if a user wants to insert only those records that do not already exist in the selected table? How does Postgres deal with such situations? Well! In PostgreSQL, the INSERT statement doesn’t support the“IF NOT EXISTS”option. So alternatively, you can use the subquery to check th...
在PostgreSQL中,我们可以使用IF语句来根据条件执行不同的代码块。IF语句具有三个条件,分别是IF、ELSIF和ELSE。下面是对这三个条件的详细说明: 1. IF条件:IF语句的第一个条件...
我使用postgres_fdw扩展将行插入到另一个服务器上的表中。所以我创建了一个外星..。让我们称它为foo,我有一个AFTER INSERT触发器,它执行一个函数,将该行插入到配置好的远程服务器上的外部表。如果服务器没有响应,触发器就会冻结,直到超时。因此,我对这个问题有几个问题:可以在执行“后插入”之前将查...
postgres=# update tabs set name = 'tony' where id=5 RETURNING id || name AS idName; idname --- 5tony (1 row) postgres=# insert into tabs values(5,'tams') returning *; ERROR: duplicate key value violates unique constraint "tabs_pkey" DETAIL: Key (id)=(5) already exists.编辑于...
I know this is an old thread but it is the first Google hit for "php Postgres PDO array", so I'll add my answer to this. The problem with Matt's answer is that there is no inherent sanitization with implode. So if $fieldname contains quotes, commas, mustache brackets, etc. it wil...
INSTALL postgres; LOAD postgres; ATTACH 'host=localhost user=postgres password=postgres' AS pg (TYPE postgres); CREATE TABLE IF NOT EXISTS pg.inventory( id INT PRIMARY KEY, name VARCHAR(255) NOT NULL, price DECIMAL(10,2) NOT NULL, quantity INT NOT NULL ); INSERT INTO pg.inventory(id, ...