Updating table with values from another table

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The Big Query Dynamic Manipulation Language (DML) enables you to update, insert, and delete data from your Big Query tables.For information about how to use DML statements, see Data Manipulation Language.If a row in the table to be updated joins with zero rows from the FROM clause, then the row isn't updated.If a row in the table to be updated joins with exactly one row from the FROM clause, then the row is updated.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.If you set a column to the value it currently has, My SQL notices this and does not update it. Records not matching the equijoin from table2 are marked with null.

A value's type is considered compatible with the target column's type if one of the following criteria are met: ------------------- ---------- -------------------- | product | quantity | supply_constrained | ------------------- ---------- -------------------- | dishwasher | 30 | NULL | | dryer | 30 | NULL | | front load washer | 20 | NULL | | microwave | 20 | NULL | | oven | 5 | NULL | | refrigerator | 10 | NULL | | top load washer | 10 | NULL | ------------------- ---------- -------------------- ----------------- ---------- -------------- | product | quantity | warehouse | ----------------- ---------- -------------- | dryer | 200 | warehouse #2 | | oven | 300 | warehouse #3 | | top load washer | 100 | warehouse #1 | ----------------- ---------- -------------- ---------------------- ---------- -------------------- ---------- ---------------- | product | quantity | supply_constrained | comments | specifications | ---------------------- ---------- -------------------- ---------- ---------------- | dishwasher | 30 | false | [] | NULL | | dryer | 30 | false | [] | NULL | | front load washer | 20 | false | [] | NULL | | microwave | 20 | false | [] | NULL | | oven | 5 | false | [] | NULL | | refrigerator | 10 | false | [] | NULL | | top load washer | 10 | false | [] | NULL | ---------------------- ---------- -------------------- ---------- ---------------- ---------------------- ---------- -------------------- ---------- ---------------- | product | quantity | supply_constrained | comments | specifications | ---------------------- ---------- -------------------- ---------- ---------------- | countertop microwave | 20 | NULL | [] | NULL | | dishwasher | 30 | false | [] | NULL | | dryer | 30 | false | [] | NULL | | front load washer | 20 | false | [] | NULL | | microwave | 20 | false | [] | NULL | | oven | 5 | false | [] | NULL | | refrigerator | 10 | false | [] | NULL | | top load washer | 10 | false | [] | NULL | ---------------------- ---------- -------------------- ---------- ---------------- Each time you construct a DELETE statement, you must use the WHERE keyword, followed by a condition.In addition, you might create one or more internal tables, which are called collections.You can build a variety of formulas that take the name of a table as an argument, just as a formula in Excel takes one or more cell references as arguments.The example above shows a record for each product (Chocolate, Bread, and Water) and a column for each category of information (Price, Quantity on Hand, and Quantity on Order).In a formula, you can refer to a record by itself, outside of a table's context, by using curly braces.

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