If there a one-shot way to update a range of IDs (eg WHERE ID
>10 AND ID
<1000) to compress a blob column (eg data
)?
eg
UPDATE `table` SET `data`=(SELECT COMPRESS(`data`) FROM `table` WHERE ID=1) WHERE ID=1
but for a range of IDs instead of a single ID. I need to update around 1500 rows that were incorrectly inserted into a DB without compression.
这项工作无效吗?:
UPDATE `table` SET `data`= COMPRESS(`data`) WHERE ID > 10 AND ID < 1000
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