Sqlite.net JSON extension syntax
I'm trying to understand how the Sqlite JSON extensions work. Lets say a company has several branches and each branch has a catalogue of stock, so I create a table like:-
SQL = "CREATE TABLE BranchStock (branch VARCHAR, stock JSON)"
....
I then insert a few items like:-
SQL = "INSERT INTO BranchStock (branch, stock) values('Melbourne', json_array(json_object('catnumber', 'ABC123', 'instock',2), json_object('catnumber', 'BCD321', 'instock',5)))"
....
SQL = "INSERT INTO BranchStock (branch, stock) values('Sydney', json_array(json_object('catnumber', 'ABC123', 'instock',5), json_object('catnumber', 'XYZ567', 'instock',3)))"
....
Now I'm looking for the search sql to list which branches have the catnumber='ABC123', and the instock amounts. Perhaps something like this:-
SQL = "SELECT branch, json_extract(stock, '$.instock') FROM BranchStock WHERE json_valid(stock) AND json_extract(stock, '$.catnumber') = 'ABC123'
Can someone help me with the correct SELECT syntax?
Thanks in advance
json sqlite sqlite3 sqlite-net
edited Nov 14 '18 at 0:52
dbc
53.8k869122
asked Nov 13 '18 at 23:50
42LeapsOfFaith42LeapsOfFaith
515
add a comment |
I'm trying to understand how the Sqlite JSON extensions work. Lets say a company has several branches and each branch has a catalogue of stock, so I create a table like:-
SQL = "CREATE TABLE BranchStock (branch VARCHAR, stock JSON)"
....
I then insert a few items like:-
SQL = "INSERT INTO BranchStock (branch, stock) values('Melbourne', json_array(json_object('catnumber', 'ABC123', 'instock',2), json_object('catnumber', 'BCD321', 'instock',5)))"
....
SQL = "INSERT INTO BranchStock (branch, stock) values('Sydney', json_array(json_object('catnumber', 'ABC123', 'instock',5), json_object('catnumber', 'XYZ567', 'instock',3)))"
....
Now I'm looking for the search sql to list which branches have the catnumber='ABC123', and the instock amounts. Perhaps something like this:-
SQL = "SELECT branch, json_extract(stock, '$.instock') FROM BranchStock WHERE json_valid(stock) AND json_extract(stock, '$.catnumber') = 'ABC123'
Can someone help me with the correct SELECT syntax?
Thanks in advance
json sqlite sqlite3 sqlite-net
edited Nov 14 '18 at 0:52
dbc
53.8k869122
asked Nov 13 '18 at 23:50
42LeapsOfFaith42LeapsOfFaith
515
add a comment |
I'm trying to understand how the Sqlite JSON extensions work. Lets say a company has several branches and each branch has a catalogue of stock, so I create a table like:-
SQL = "CREATE TABLE BranchStock (branch VARCHAR, stock JSON)"
....
I then insert a few items like:-
SQL = "INSERT INTO BranchStock (branch, stock) values('Melbourne', json_array(json_object('catnumber', 'ABC123', 'instock',2), json_object('catnumber', 'BCD321', 'instock',5)))"
....
SQL = "INSERT INTO BranchStock (branch, stock) values('Sydney', json_array(json_object('catnumber', 'ABC123', 'instock',5), json_object('catnumber', 'XYZ567', 'instock',3)))"
....
Now I'm looking for the search sql to list which branches have the catnumber='ABC123', and the instock amounts. Perhaps something like this:-
SQL = "SELECT branch, json_extract(stock, '$.instock') FROM BranchStock WHERE json_valid(stock) AND json_extract(stock, '$.catnumber') = 'ABC123'
Can someone help me with the correct SELECT syntax?
Thanks in advance
json sqlite sqlite3 sqlite-net
edited Nov 14 '18 at 0:52
dbc
53.8k869122
asked Nov 13 '18 at 23:50
42LeapsOfFaith42LeapsOfFaith
515
I'm trying to understand how the Sqlite JSON extensions work. Lets say a company has several branches and each branch has a catalogue of stock, so I create a table like:-
SQL = "CREATE TABLE BranchStock (branch VARCHAR, stock JSON)"
....
I then insert a few items like:-
SQL = "INSERT INTO BranchStock (branch, stock) values('Melbourne', json_array(json_object('catnumber', 'ABC123', 'instock',2), json_object('catnumber', 'BCD321', 'instock',5)))"
....
SQL = "INSERT INTO BranchStock (branch, stock) values('Sydney', json_array(json_object('catnumber', 'ABC123', 'instock',5), json_object('catnumber', 'XYZ567', 'instock',3)))"
....
Now I'm looking for the search sql to list which branches have the catnumber='ABC123', and the instock amounts. Perhaps something like this:-
SQL = "SELECT branch, json_extract(stock, '$.instock') FROM BranchStock WHERE json_valid(stock) AND json_extract(stock, '$.catnumber') = 'ABC123'
Can someone help me with the correct SELECT syntax?
Thanks in advance
json sqlite sqlite3 sqlite-net
json sqlite sqlite3 sqlite-net
edited Nov 14 '18 at 0:52
dbc
53.8k869122
asked Nov 13 '18 at 23:50
42LeapsOfFaith42LeapsOfFaith
515
edited Nov 14 '18 at 0:52
dbc
53.8k869122
asked Nov 13 '18 at 23:50
42LeapsOfFaith42LeapsOfFaith
515
edited Nov 14 '18 at 0:52
dbc
53.8k869122
edited Nov 14 '18 at 0:52
dbc
53.8k869122
edited Nov 14 '18 at 0:52
dbc
53.8k869122
53.8k869122
asked Nov 13 '18 at 23:50
42LeapsOfFaith42LeapsOfFaith
515
asked Nov 13 '18 at 23:50
42LeapsOfFaith42LeapsOfFaith
515
asked Nov 13 '18 at 23:50
42LeapsOfFaith42LeapsOfFaith
515
515
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Note: I don't recommend actually using this for anything that's going to be run frequently or on huge tables, but if you absolutely have to...
Given the following test table:
CREATE TABLE BranchStock(branch TEXT, stock TEXT);
INSERT INTO BranchStock VALUES('Melbourne','[{"catnumber":"ABC123","instock":2},{"catnumber":"BCD321","instock":5}]');
INSERT INTO BranchStock VALUES('Sydney','[{"catnumber":"ABC123","instock":5},{"catnumber":"XYZ567","instock":3}]');
Getting the branches and instock number for stores with 'ABC123':
SELECT branch, json_extract(value, '$.instock') AS instock
FROM BranchStock JOIN json_each(stock)
WHERE json_extract(value, '$.catnumber') = 'ABC123';
gives
branch instock
---------- ----------
Melbourne 2
Sydney 5
It'd be a lot easier and more efficient to do pretty much anything using a table definition like
CREATE TABLE BranchStock(branch TEXT, catid TEXT, instock INTEGER);
instead of trying to search through JSON data stored in a column. For example:
SELECT branch, instock FROM BranchStock WHERE catid = 'ABC123';
especially when you start adding indexes into the mix.
answered Nov 14 '18 at 4:20
ShawnShawn
3,6781613
Thank you very much, it's exactly what I was looking for. I take your point that it is not the solution for performance - but it does offer a simple db design... Thanks again.
– 42LeapsOfFaith
Nov 14 '18 at 8:18
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Note: I don't recommend actually using this for anything that's going to be run frequently or on huge tables, but if you absolutely have to...
Given the following test table:
CREATE TABLE BranchStock(branch TEXT, stock TEXT);
INSERT INTO BranchStock VALUES('Melbourne','[{"catnumber":"ABC123","instock":2},{"catnumber":"BCD321","instock":5}]');
INSERT INTO BranchStock VALUES('Sydney','[{"catnumber":"ABC123","instock":5},{"catnumber":"XYZ567","instock":3}]');
Getting the branches and instock number for stores with 'ABC123':
SELECT branch, json_extract(value, '$.instock') AS instock
FROM BranchStock JOIN json_each(stock)
WHERE json_extract(value, '$.catnumber') = 'ABC123';
gives
branch instock
---------- ----------
Melbourne 2
Sydney 5
It'd be a lot easier and more efficient to do pretty much anything using a table definition like
CREATE TABLE BranchStock(branch TEXT, catid TEXT, instock INTEGER);
instead of trying to search through JSON data stored in a column. For example:
SELECT branch, instock FROM BranchStock WHERE catid = 'ABC123';
especially when you start adding indexes into the mix.
answered Nov 14 '18 at 4:20
ShawnShawn
3,6781613
Thank you very much, it's exactly what I was looking for. I take your point that it is not the solution for performance - but it does offer a simple db design... Thanks again.
– 42LeapsOfFaith
Nov 14 '18 at 8:18
add a comment |
Note: I don't recommend actually using this for anything that's going to be run frequently or on huge tables, but if you absolutely have to...
Given the following test table:
CREATE TABLE BranchStock(branch TEXT, stock TEXT);
INSERT INTO BranchStock VALUES('Melbourne','[{"catnumber":"ABC123","instock":2},{"catnumber":"BCD321","instock":5}]');
INSERT INTO BranchStock VALUES('Sydney','[{"catnumber":"ABC123","instock":5},{"catnumber":"XYZ567","instock":3}]');
Getting the branches and instock number for stores with 'ABC123':
SELECT branch, json_extract(value, '$.instock') AS instock
FROM BranchStock JOIN json_each(stock)
WHERE json_extract(value, '$.catnumber') = 'ABC123';
gives
branch instock
---------- ----------
Melbourne 2
Sydney 5
It'd be a lot easier and more efficient to do pretty much anything using a table definition like
CREATE TABLE BranchStock(branch TEXT, catid TEXT, instock INTEGER);
instead of trying to search through JSON data stored in a column. For example:
SELECT branch, instock FROM BranchStock WHERE catid = 'ABC123';
especially when you start adding indexes into the mix.
answered Nov 14 '18 at 4:20
ShawnShawn
3,6781613
Thank you very much, it's exactly what I was looking for. I take your point that it is not the solution for performance - but it does offer a simple db design... Thanks again.
– 42LeapsOfFaith
Nov 14 '18 at 8:18
add a comment |
Note: I don't recommend actually using this for anything that's going to be run frequently or on huge tables, but if you absolutely have to...
Given the following test table:
CREATE TABLE BranchStock(branch TEXT, stock TEXT);
INSERT INTO BranchStock VALUES('Melbourne','[{"catnumber":"ABC123","instock":2},{"catnumber":"BCD321","instock":5}]');
INSERT INTO BranchStock VALUES('Sydney','[{"catnumber":"ABC123","instock":5},{"catnumber":"XYZ567","instock":3}]');
Getting the branches and instock number for stores with 'ABC123':
SELECT branch, json_extract(value, '$.instock') AS instock
FROM BranchStock JOIN json_each(stock)
WHERE json_extract(value, '$.catnumber') = 'ABC123';
gives
branch instock
---------- ----------
Melbourne 2
Sydney 5
It'd be a lot easier and more efficient to do pretty much anything using a table definition like
CREATE TABLE BranchStock(branch TEXT, catid TEXT, instock INTEGER);
instead of trying to search through JSON data stored in a column. For example:
SELECT branch, instock FROM BranchStock WHERE catid = 'ABC123';
especially when you start adding indexes into the mix.
answered Nov 14 '18 at 4:20
ShawnShawn
3,6781613
Note: I don't recommend actually using this for anything that's going to be run frequently or on huge tables, but if you absolutely have to...
Given the following test table:
CREATE TABLE BranchStock(branch TEXT, stock TEXT);
INSERT INTO BranchStock VALUES('Melbourne','[{"catnumber":"ABC123","instock":2},{"catnumber":"BCD321","instock":5}]');
INSERT INTO BranchStock VALUES('Sydney','[{"catnumber":"ABC123","instock":5},{"catnumber":"XYZ567","instock":3}]');
Getting the branches and instock number for stores with 'ABC123':
SELECT branch, json_extract(value, '$.instock') AS instock
FROM BranchStock JOIN json_each(stock)
WHERE json_extract(value, '$.catnumber') = 'ABC123';
gives
branch instock
---------- ----------
Melbourne 2
Sydney 5
It'd be a lot easier and more efficient to do pretty much anything using a table definition like
CREATE TABLE BranchStock(branch TEXT, catid TEXT, instock INTEGER);
instead of trying to search through JSON data stored in a column. For example:
SELECT branch, instock FROM BranchStock WHERE catid = 'ABC123';
especially when you start adding indexes into the mix.
answered Nov 14 '18 at 4:20
ShawnShawn
3,6781613
edited Nov 14 '18 at 4:32
answered Nov 14 '18 at 4:20
ShawnShawn
3,6781613
answered Nov 14 '18 at 4:20
ShawnShawn
3,6781613
answered Nov 14 '18 at 4:20
ShawnShawn
3,6781613
3,6781613
Thank you very much, it's exactly what I was looking for. I take your point that it is not the solution for performance - but it does offer a simple db design... Thanks again.
– 42LeapsOfFaith
Nov 14 '18 at 8:18
add a comment |
Thank you very much, it's exactly what I was looking for. I take your point that it is not the solution for performance - but it does offer a simple db design... Thanks again.
– 42LeapsOfFaith
Nov 14 '18 at 8:18
Thank you very much, it's exactly what I was looking for. I take your point that it is not the solution for performance - but it does offer a simple db design... Thanks again.
– 42LeapsOfFaith
Nov 14 '18 at 8:18
Thank you very much, it's exactly what I was looking for. I take your point that it is not the solution for performance - but it does offer a simple db design... Thanks again.
– 42LeapsOfFaith
Nov 14 '18 at 8:18
add a comment |
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