sql update a row code example

Example 1: sql update query

--update query example
 UPDATE table_name
 SET column1 = value1, column2 = value2, ...
 WHERE condition;

Example 2: sql update with statement

UPDATE mytable t		-- Update using WITH statement
SET value3 = (
    WITH comp AS (
        SELECT id, value1
        FROM mytable t
        WHERE value2 > 10
    )
    SELECT c.value1
    FROM comp c
    WHERE c.id = t.id
);

Example 3: sql update from select

UPDATE
    Table_A
SET
    Table_A.col1 = Table_B.col1,
    Table_A.col2 = Table_B.col2
FROM
    Some_Table AS Table_A
    INNER JOIN Other_Table AS Table_B
        ON Table_A.id = Table_B.id
WHERE
    Table_A.col3 = 'cool'

Example 4: sql update record

UPDATE table_name
SET column1 = value1, column2 = value2...., columnN = valueN
WHERE [condition];

Example 5: how to update values in sql

//to update value

UPDATE students SET course_id = 102
WHERE last_name = 'Jones'; -> 
                 if there is no condition it will update all!