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
recipient_id映射到地址表的_id
如果地址为HELLO,我需要将type
更新为特定值。我该怎么做?我已经尝试了
UPDATE threads SET threads.type = 106 FROM threads
INNER JOIN
addresses ON addresses._id = threads.recipient_ids
AND
addresses.address LIKE '%HELLO%';
但我收到错误near ".": syntax error
。
更新列的正确语法是什么?
答案 0 :(得分:2)
您可以使用IN
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;