Update Querie

UPDATE

Once there's data in the table, we might find that there is a need to modify the data. To do so, we can use the

UPDATE command. The syntax for this is
UPDATE "table_name"
SET "column_1" = [new value]
WHERE {condition}

For example, say we currently have a table as below:

Table Shop

and we notice that the sales for Kumar on 01/08/1999 is actually $500 instead of $300, and that particular entry needs to be updated. To do so, we use the following SQL:

UPDATE ShopSET Sales = 500

WHERE store_name = "Kumar"

AND Date = "Jan-08-1999"

The resulting table would look like

Table Shop

In this case, there is only one row that satisfies the condition in the WHERE clause. If there are multiple rows that satisfy the condition, all of them will be modified. If no WHERE clause is specified, all rows will be modified.

It is also possible to UPDATE multiple columns at the same time. The syntax in this case would look like the following:

UPDATE "table_name"
SET column_1 = [value1], column_2 = [value2]
WHERE {condition}