Select subquery CHECK constraint DB2
I have 2 tables: TVSHOW and ACTOR. I want to reject records if the inserted actor in TVSHOW does not exist in the ACTOR table using DB2.
db2 "ALTER TABLE TVSHOW ADD CONSTRAINT check_actor CHECK (actor in (select id from ACTOR))"
I keep running into, During SQL processing it returned: SQL0546N The check constraint "check_actor" is invalid.
How can I fix this?
db2 constraint
asked Nov 24 '18 at 19:33
user2251234user2251234
82
add a comment |
I have 2 tables: TVSHOW and ACTOR. I want to reject records if the inserted actor in TVSHOW does not exist in the ACTOR table using DB2.
db2 "ALTER TABLE TVSHOW ADD CONSTRAINT check_actor CHECK (actor in (select id from ACTOR))"
I keep running into, During SQL processing it returned: SQL0546N The check constraint "check_actor" is invalid.
How can I fix this?
db2 constraint
asked Nov 24 '18 at 19:33
user2251234user2251234
82
add a comment |
I have 2 tables: TVSHOW and ACTOR. I want to reject records if the inserted actor in TVSHOW does not exist in the ACTOR table using DB2.
db2 "ALTER TABLE TVSHOW ADD CONSTRAINT check_actor CHECK (actor in (select id from ACTOR))"
I keep running into, During SQL processing it returned: SQL0546N The check constraint "check_actor" is invalid.
How can I fix this?
db2 constraint
asked Nov 24 '18 at 19:33
user2251234user2251234
82
I have 2 tables: TVSHOW and ACTOR. I want to reject records if the inserted actor in TVSHOW does not exist in the ACTOR table using DB2.
db2 "ALTER TABLE TVSHOW ADD CONSTRAINT check_actor CHECK (actor in (select id from ACTOR))"
I keep running into, During SQL processing it returned: SQL0546N The check constraint "check_actor" is invalid.
How can I fix this?
db2 constraint
db2 constraint
asked Nov 24 '18 at 19:33
user2251234user2251234
82
asked Nov 24 '18 at 19:33
user2251234user2251234
82
asked Nov 24 '18 at 19:33
user2251234user2251234
82
asked Nov 24 '18 at 19:33
user2251234user2251234
82
asked Nov 24 '18 at 19:33
user2251234user2251234
82
82
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You cannot use a subselect in a check constraint; you can only reference columns from the same table.
However, what you want to accomplish is what referential integrity constraints, also known as foreign keys, are for.
ALTER TABLE TVSHOW ADD CONSTRAINT actor_fk FOREIGN KEY (actor) REFERENCES ACTOR(id)
Presumably you have already defined a primary key constraint on ACTOR.id; if not, you need to define it, or a unique constraint on that column.
answered Nov 24 '18 at 20:03
mustacciomustaccio
9,55872237
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "182"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fdba.stackexchange.com%2fquestions%2f223340%2fselect-subquery-check-constraint-db2%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You cannot use a subselect in a check constraint; you can only reference columns from the same table.
However, what you want to accomplish is what referential integrity constraints, also known as foreign keys, are for.
ALTER TABLE TVSHOW ADD CONSTRAINT actor_fk FOREIGN KEY (actor) REFERENCES ACTOR(id)
Presumably you have already defined a primary key constraint on ACTOR.id; if not, you need to define it, or a unique constraint on that column.
answered Nov 24 '18 at 20:03
mustacciomustaccio
9,55872237
add a comment |
You cannot use a subselect in a check constraint; you can only reference columns from the same table.
However, what you want to accomplish is what referential integrity constraints, also known as foreign keys, are for.
ALTER TABLE TVSHOW ADD CONSTRAINT actor_fk FOREIGN KEY (actor) REFERENCES ACTOR(id)
Presumably you have already defined a primary key constraint on ACTOR.id; if not, you need to define it, or a unique constraint on that column.
answered Nov 24 '18 at 20:03
mustacciomustaccio
9,55872237
add a comment |
You cannot use a subselect in a check constraint; you can only reference columns from the same table.
However, what you want to accomplish is what referential integrity constraints, also known as foreign keys, are for.
ALTER TABLE TVSHOW ADD CONSTRAINT actor_fk FOREIGN KEY (actor) REFERENCES ACTOR(id)
Presumably you have already defined a primary key constraint on ACTOR.id; if not, you need to define it, or a unique constraint on that column.
answered Nov 24 '18 at 20:03
mustacciomustaccio
9,55872237
You cannot use a subselect in a check constraint; you can only reference columns from the same table.
However, what you want to accomplish is what referential integrity constraints, also known as foreign keys, are for.
ALTER TABLE TVSHOW ADD CONSTRAINT actor_fk FOREIGN KEY (actor) REFERENCES ACTOR(id)
Presumably you have already defined a primary key constraint on ACTOR.id; if not, you need to define it, or a unique constraint on that column.
answered Nov 24 '18 at 20:03
mustacciomustaccio
9,55872237
edited Nov 25 '18 at 14:17
answered Nov 24 '18 at 20:03
mustacciomustaccio
9,55872237
answered Nov 24 '18 at 20:03
mustacciomustaccio
9,55872237
answered Nov 24 '18 at 20:03
mustacciomustaccio
9,55872237
9,55872237
add a comment |
add a comment |
Thanks for contributing an answer to Database Administrators Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fdba.stackexchange.com%2fquestions%2f223340%2fselect-subquery-check-constraint-db2%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
