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If an update on a row would result in a violation of a primary key or unique index, the update on that row is not performed.
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You can use our tools to convert data from one database format to another database format.
While converting you can filter columns, map source table columns to target table columns and also specify WHERE conditions to filter rows.
So, I do it in one "magick" query ;)Here an example:"3" is a some value, from form or somethingupdate item set rate = case when round((rate 3)/2) You sometimes run into the problem that you want to replace a substring occuring in a column with a different string, without touching the rest of the string.A table that contains entries of different categories, in which an internal order needs to represented ( lets say a table with busstops on different routes).If you add new entries or move stops from one route to another you will most likely want to increment the position of the busstop within this route.If you access a column from the table to be updated in an expression, assignments are generally evaluated from left to right.For multiple-table updates, there is no guarantee that assignments are carried out in any particular order. COLUMN2 IS NULLAn outerjoin is performed based on the equijoin condition.