SELECT uast_extract(
 uast(blob_content, 'csharp', "(//csharp:BinaryExpression_AddExpression/Left/uast:String | //csharp:InterpolatedStringExpression//csharp:InterpolatedStringTextToken[1])[starts-with(normalize-space(@Value), 'SELECT') or starts-with(normalize-space(@Value), 'select') or starts-with(normalize-space(@Value), 'UPDATE') or starts-with(normalize-space(@Value), 'update') or starts-with(normalize-space(@Value), 'DELETE') or starts-with(normalize-space(@Value), 'delete') or starts-with(normalize-space(@Value), 'INSERT') or starts-with(normalize-space(@Value), 'insert') or starts-with(normalize-space(@Value), 'CREATE') or starts-with(normalize-space(@Value), 'create') or starts-with(normalize-space(@Value), 'ALTER') or starts-with(normalize-space(@Value), 'alter') or starts-with(normalize-space(@Value), 'DROP') or starts-with(normalize-space(@Value), 'drop')]"),
 '@pos') AS positions,
 repository_id,
 file_path
FROM (
 SELECT f.repository_id,
 f.file_path,
 b.blob_content
 FROM (
 SELECT *
 FROM refs r
 NATURAL JOIN commit_blobs cb
 NATURAL JOIN blobs
 WHERE r.ref_name = 'HEAD'
 AND NOT IS_BINARY(blob_content)
 ) b
 INNER JOIN (
 SELECT repository_id, file_path, blob_hash
 FROM refs r
 NATURAL JOIN commit_files cf
 WHERE r.ref_name = 'HEAD'
 ) f
 ON b.blob_hash = f.blob_hash
 AND b.repository_id = f.repository_id
 WHERE language(f.file_path, b.blob_content) = 'C#'
) t
WHERE positions IS NOT NULL