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Q&A for developers building blockchains with the Substrate SDK

-- Step 2: Extract posts for the selected users
WITH PostBatch AS (
    SELECT
        p.Id AS PostId,
        p.Title,
        p.Body,
        p.OwnerUserId AS UserId,
        u.DisplayName,
        t.TagName,
        u.Location,
        ROW_NUMBER() OVER (PARTITION BY p.OwnerUserId ORDER BY p.CreationDate DESC) AS PostRowNum
    FROM Posts p
    INNER JOIN Users u ON p.OwnerUserId = u.Id
    INNER JOIN PostTags pt ON p.Id = pt.PostId
    INNER JOIN Tags t ON pt.TagId = t.Id
    WHERE LOWER(t.TagName) IN ('python', 'java', 'csharp', 'php', 'javascript', 'go', 'swift') -- Programming languages filter
    AND p.OwnerUserId IN (720030,20498,1035008,764272,327083,116838,1678148,1731626,9274732,245265,57997,111663,148195,1751766,350272,7913,4031815,904316,1367454,335858,65863,45375,9530,26428,7964527,3474,36305,2680216,230513,1694,13531,500584,836330,501250,329769,65696,97101,67,4249,3207,62576,643383,1053,5056,179850,184046,710446,35092,149080,4105,27439,131368,45,1329652,30461,59111,562459,283863,2635,35690,39975,2424,17693,6694,15682,16241,46926,659804,483779,1957251,995714,248616,1192728,4328123,653457,9201587,401539,6108390,205528,399104,804799,253940,719212,5282585,403610,2957534,566360,280041,1081668,1399505,972671,3214202,1953801,907184,1639366,1653521,1050058,226145,1643980,248002)
   )
SELECT
    p.PostId,
    p.Title AS PostTitle,
    p.Body AS PostBody,
    p.UserId,
    P.DisplayName AS UserName,
    p.Location AS UserCountry,
    p.TagName AS PostTag
FROM PostBatch p
WHERE p.PostRowNum BETWEEN 0 AND 500;

fork query

edited nov 1

created nov 1 anonymous