Database 使用where子句连接两个表后更新列
我有两张桌子 线程表Database 使用where子句连接两个表后更新列,database,sqlite,Database,Sqlite,我有两张桌子 线程表 _id recipient_id type 1 1 2 1 3 2 和地址表 _id address 1 HELLO 2 BYE 收件人\u id映射到地址表的\u id 如果地址是HELLO,我需要将类型更新为特定值。我该怎么做?我已经试过了 UPDATE threads SET threads.type = 106 FROM threads INNER JOIN address
_id recipient_id type
1 1
2 1
3 2
和地址表
_id address
1 HELLO
2 BYE
收件人\u id映射到地址表的\u id
如果地址是HELLO,我需要将类型
更新为特定值。我该怎么做?我已经试过了
UPDATE threads SET threads.type = 106 FROM threads
INNER JOIN
addresses ON addresses._id = threads.recipient_ids
AND
addresses.address LIKE '%HELLO%';
但是我在“.”附近遇到了一个错误:语法错误。
更新列的正确语法是什么?您可以使用以下运算符:
sqlite> .dump
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE threads (_id integer primary key, recipient_id integer, type text);
INSERT INTO "threads" VALUES(1,1,NULL);
INSERT INTO "threads" VALUES(2,1,NULL);
INSERT INTO "threads" VALUES(3,2,NULL);
CREATE TABLE addresses (_id integer primary key, address text);
INSERT INTO "addresses" VALUES(1,'HELLO');
INSERT INTO "addresses" VALUES(2,'BYE');
COMMIT;
sqlite> update threads set type = 106 where _id in
...> (select t._id from threads t, addresses a
...> where t.recipient_id = a._id and a.address like '%HELLO%');
sqlite> .dump
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE threads (_id integer primary key, recipient_id integer, type text);
INSERT INTO "threads" VALUES(1,1,'106');
INSERT INTO "threads" VALUES(2,1,'106');
INSERT INTO "threads" VALUES(3,2,NULL);
CREATE TABLE addresses (_id integer primary key, address text);
INSERT INTO "addresses" VALUES(1,'HELLO');
INSERT INTO "addresses" VALUES(2,'BYE');
COMMIT;
SQLite是否支持从
更新?谢谢你的信息。我不知道。那么,如果没有来自的更新,我怎么做呢