I need help in converting json data into datatable and store inside postgresql DB.
For example,
[{"name":"abc", "role":"swe"}, {"name":"xyz", "role":"Tester"}]
I'd like to convert the above data or lets say store the data as a table with rows and columns.
I think we do have a datatype called "json" but it's to store the entire json right? But I want to convert as real table what we see in DB, like below,
name | role
--------------+-------
"abc" | "swe"
"xyz" | "Tester
Could you please help me how to parse them please? I'm using Node JS.
Any pointers will be helpful. Thanks a lot for your time.
I think it will work, convert your json into object and prepare and insert it using npm package node-postgres(np)
and node-sql(sql || sql string builder for node)
, Take reference from the following the code.
const pg = require('pg');
const sql = require('sql');
let usersToInsert = JSON.parse(`[{"name":"abc", "role":"swe"}, {"name":"xyz", "role":"Tester"}]`);
let User = sql.define({
name: 'users',
columns: [
'name',
'role'
]
});
async function run() {
let client;
try {
client = new pg.Client({
connectionString: 'postgresql://localhost/node_example'
});
await client.connect();
let query = User.insert(usersToInsert).toQuery();
console.log(query);
let {rows} = await client.query(query);
console.log(rows);
} catch (e) {
console.error(e);
} finally {
client.end();
}
}
run();
May be something like you need ?
select jsonb_array_elements(j)->>'name' as name, jsonb_array_elements(j)->>'role' as role
from (
select '[{"name":"abc", "role":"swe"}, {"name":"xyz", "role":"Tester"}]'::jsonb as j
) t
If so, You can simply do INSERT INTO .. SELECT
for saving data into table
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