Updating two tables in a single query in sql
If you’re uncertain about support for these concepts in your database, please refer to your manufacturer’s documentation.
Explicit join operation for two and more tables may be present in the FROM clause.
The condition for the above tables may be a coincidence of the values, say, in the columns a and c: i.e.
only those table rows that have equal values in specified columns (equi-join) are joined.
Suggested exercises: 6, 9, 13, 16, 19, 21, 34, 50, 55.
It’s sometimes difficult to know which SQL syntax to use when combining data that spans multiple tables.
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The SELECT operator syntax given at the end of the previous chapter shows that more than one table may be pointed in the FROM clause.