How to populate rows where a key word exists
I am trying to add a boolean of true to specific elements within a column called exempt_from_discount, for simplicity sake and for my understanding lets just say where school or anything child related appears I would like to make the exempt_from_discount true. So far the table looks like the following:
My initial thought was to write a query that sets all the elements to false by the following via my migration:
ALTER TABLE ticket_types
ALTER exempt_from_discount SET DEFAULT false;
And then once this is done set each one that contains school/is based on a child to true. I am limited on knowledge regarding SQL and am not sure how this would be achieved (Bare in mind this is only about 1/4 of the table so doing it manually per row might not be the best with efficiency in hindsight.). I am greatfull for any input/hints as I am eager to learn more about SQL.
sql postgresql
edited Nov 13 '18 at 13:51
a_horse_with_no_name
294k46451544
asked Nov 13 '18 at 13:01
JvBJvB
9614
add a comment |
I am trying to add a boolean of true to specific elements within a column called exempt_from_discount, for simplicity sake and for my understanding lets just say where school or anything child related appears I would like to make the exempt_from_discount true. So far the table looks like the following:
My initial thought was to write a query that sets all the elements to false by the following via my migration:
ALTER TABLE ticket_types
ALTER exempt_from_discount SET DEFAULT false;
And then once this is done set each one that contains school/is based on a child to true. I am limited on knowledge regarding SQL and am not sure how this would be achieved (Bare in mind this is only about 1/4 of the table so doing it manually per row might not be the best with efficiency in hindsight.). I am greatfull for any input/hints as I am eager to learn more about SQL.
sql postgresql
edited Nov 13 '18 at 13:51
a_horse_with_no_name
294k46451544
asked Nov 13 '18 at 13:01
JvBJvB
9614
Correct-a-mundo
– JvB
Nov 13 '18 at 13:51
add a comment |
I am trying to add a boolean of true to specific elements within a column called exempt_from_discount, for simplicity sake and for my understanding lets just say where school or anything child related appears I would like to make the exempt_from_discount true. So far the table looks like the following:
My initial thought was to write a query that sets all the elements to false by the following via my migration:
ALTER TABLE ticket_types
ALTER exempt_from_discount SET DEFAULT false;
And then once this is done set each one that contains school/is based on a child to true. I am limited on knowledge regarding SQL and am not sure how this would be achieved (Bare in mind this is only about 1/4 of the table so doing it manually per row might not be the best with efficiency in hindsight.). I am greatfull for any input/hints as I am eager to learn more about SQL.
sql postgresql
edited Nov 13 '18 at 13:51
a_horse_with_no_name
294k46451544
asked Nov 13 '18 at 13:01
JvBJvB
9614
I am trying to add a boolean of true to specific elements within a column called exempt_from_discount, for simplicity sake and for my understanding lets just say where school or anything child related appears I would like to make the exempt_from_discount true. So far the table looks like the following:
My initial thought was to write a query that sets all the elements to false by the following via my migration:
ALTER TABLE ticket_types
ALTER exempt_from_discount SET DEFAULT false;
And then once this is done set each one that contains school/is based on a child to true. I am limited on knowledge regarding SQL and am not sure how this would be achieved (Bare in mind this is only about 1/4 of the table so doing it manually per row might not be the best with efficiency in hindsight.). I am greatfull for any input/hints as I am eager to learn more about SQL.
sql postgresql
sql postgresql
edited Nov 13 '18 at 13:51
a_horse_with_no_name
294k46451544
asked Nov 13 '18 at 13:01
JvBJvB
9614
edited Nov 13 '18 at 13:51
a_horse_with_no_name
294k46451544
asked Nov 13 '18 at 13:01
JvBJvB
9614
edited Nov 13 '18 at 13:51
a_horse_with_no_name
294k46451544
edited Nov 13 '18 at 13:51
a_horse_with_no_name
294k46451544
edited Nov 13 '18 at 13:51
a_horse_with_no_name
294k46451544
294k46451544
asked Nov 13 '18 at 13:01
JvBJvB
9614
asked Nov 13 '18 at 13:01
JvBJvB
9614
asked Nov 13 '18 at 13:01
JvBJvB
9614
9614
Correct-a-mundo
– JvB
Nov 13 '18 at 13:51
add a comment |
Correct-a-mundo
– JvB
Nov 13 '18 at 13:51
Correct-a-mundo
– JvB
Nov 13 '18 at 13:51
Correct-a-mundo
– JvB
Nov 13 '18 at 13:51
add a comment |
1 Answer
1
active
oldest
votes
Use UPDATE to change values
UPDATE ticket_types
SET exempt_from_discount = FALSE
WHERE TRUE
Set the where condition accordingly.
answered Nov 13 '18 at 13:17
Jean-Marc ZimmerJean-Marc Zimmer
37414
add a comment |
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1 Answer
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active
oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Use UPDATE to change values
UPDATE ticket_types
SET exempt_from_discount = FALSE
WHERE TRUE
Set the where condition accordingly.
answered Nov 13 '18 at 13:17
Jean-Marc ZimmerJean-Marc Zimmer
37414
add a comment |
Use UPDATE to change values
UPDATE ticket_types
SET exempt_from_discount = FALSE
WHERE TRUE
Set the where condition accordingly.
answered Nov 13 '18 at 13:17
Jean-Marc ZimmerJean-Marc Zimmer
37414
add a comment |
Use UPDATE to change values
UPDATE ticket_types
SET exempt_from_discount = FALSE
WHERE TRUE
Set the where condition accordingly.
answered Nov 13 '18 at 13:17
Jean-Marc ZimmerJean-Marc Zimmer
37414
Use UPDATE to change values
UPDATE ticket_types
SET exempt_from_discount = FALSE
WHERE TRUE
Set the where condition accordingly.
answered Nov 13 '18 at 13:17
Jean-Marc ZimmerJean-Marc Zimmer
37414
edited Nov 13 '18 at 13:35
answered Nov 13 '18 at 13:17
Jean-Marc ZimmerJean-Marc Zimmer
37414
answered Nov 13 '18 at 13:17
Jean-Marc ZimmerJean-Marc Zimmer
37414
answered Nov 13 '18 at 13:17
Jean-Marc ZimmerJean-Marc Zimmer
37414
37414
add a comment |
add a comment |
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Correct-a-mundo
– JvB
Nov 13 '18 at 13:51