inputPreviewOffsetLeft, inputPreviewOffsetTop, inputPreviewSizeWidth, inputPreviewSizeHeight are present in the display_preview table and display. display_preview has a foreign key displayId on display table.
INSERT INTO display_preview b (b.inputPreviewOffsetLeft, b.inputPreviewOffsetTop, b.inputPreviewSizeWidth, b.inputPreviewSizeHeight)
SELECT bd.inputPreviewOffsetLeft, bd.inputPreviewOffsetTop, bd.inputPreviewSizeWidth, bd.inputPreviewSizeHeight
FROM display
INNER JOIN display bd on bd.id = b.displayId
Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'b (b.inputPreviewOffsetLeft, b.inputPreviewOffsetTop, b.inputPreviewSizeWidth...' at line 1
You don't need to get INSERT table an alias name and I think you might want to use INSERT INTO ... SELECT on display_preview and display
you can try the below query
INSERT INTO display_preview (inputPreviewOffsetLeft,inputPreviewOffsetTop, inputPreviewSizeWidth, inputPreviewSizeHeight)
SELECT bd.inputPreviewOffsetLeft, bd.inputPreviewOffsetTop, bd.inputPreviewSizeWidth, bd.inputPreviewSizeHeight
FROM display_preview b
INNER JOIN display bd on bd.id = b.displayId
EDIT
If you want to do UPDATE ... JOIN you can try this.
UPDATE display_preview b
INNER JOIN display bd on bd.id = b.displayId
SET
b.inputPreviewOffsetLeft = bd.inputPreviewOffsetLeft,
b.inputPreviewOffsetTop = bd.inputPreviewOffsetTop,
b.inputPreviewSizeWidth = bd.inputPreviewSizeWidth ,
b.inputPreviewSizeHeight = bd.inputPreviewSizeHeight
For more detail you can refer to MySQL UPDATE JOIN
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