insert to first table if field A equals field B from a second table using sql

Check out example codes for "insert to first table if field A equals field B from a second table using sql". It will help you in understanding the concepts better.

Code Example 1

UPDATE Table_1 SET Field_X = (SELECT Field_Y FROM Table_2 WHERE Table_1.Field_A=Table_2.Field_B LIMIT 1)

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