Answer by Claire mcc for DolphinDB: How to concatenate streaming data from...
You can use the createEquiJoinEngine function, specify t to both leftTable and rightTable, “Time“ to timeColumn, “StockID“ to matchingColumn, and ingest records with tag A into the left table and...
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Suppose there is a table t with a “Time“ column, a “StockID“ column, a “tag“ column, and another 50 columns (e.g. F1, F2, F3…F50). For each stock at a specific timestamp, there are two records with tag...
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