Updating a values in mysql row updating in gridview in asp net c

---- ------------ ----------- ------------------------ -------- ------- | id | first_name | last_name | job_title | salary | notes | ---- ------------ ----------- ------------------------ -------- ------- | 1 | Robin | Jackman | Software Engineer | 5700 | NULL | | 2 | Taylor | Edward | Software Architect | 7200 | NULL | | 3 | Vivian | Dickens | Database Administrator | 6000 | NULL | | 4 | Harry | Clifford | Database Administrator | 6800 | NULL | | 5 | Eliza | Clifford | Software Engineer | 4750 | NULL | | 6 | Nancy | Newman | Software Engineer | 5100 | NULL | | 7 | Melinda | Clifford | Project Manager | 8500 | NULL | | 8 | Harley | Gilbert | Software Architect | 8000 | NULL | ---- ------------ ----------- ------------------------ -------- ------- Following query appends a note to the existing `notes` value after a period and a space.

If the current value is NULL, separator is omitted and only the new note is added (it's the behavior of CONCAT_WS() function).

---- ------------ ----------- ------------------------ -------- ------- | id | first_name | last_name | job_title | salary | notes | ---- ------------ ----------- ------------------------ -------- ------- | 1 | Robin | Jackman | Software Engineer | 5500 | NULL | | 2 | Taylor | Edward | Software Architect | 7200 | NULL | | 3 | Vivian | Dickens | Database Administrator | 6500 | NULL | | 4 | Harry | Clifford | Database Administrator | 6800 | NULL | | 5 | Eliza | Clifford | Software Engineer | 4750 | NULL | | 6 | Nancy | Newman | Software Engineer | 5100 | NULL | | 7 | Melinda | Clifford | Project Manager | 8500 | NULL | | 8 | Harley | Gilbert | Software Architect | 8000 | NULL | ---- ------------ ----------- ------------------------ -------- ------- It’s optional to have a WHERE clause in UPDATE statements. For an example, in above query, if WHERE clause was omitted, salary will be set to 6500 for all the employees.

---- ------------ ----------- ------------------------ -------- ------- | id | first_name | last_name | job_title | salary | notes | ---- ------------ ----------- ------------------------ -------- ------- | 1 | Robin | Jackman | Software Engineer | 5500 | NULL | | 2 | Taylor | Edward | Software Architect | 7200 | NULL | | 3 | Vivian | Dickens | Database Administrator | 6000 | NULL | | 4 | Harry | Clifford | Database Administrator | 6800 | NULL | | 5 | Eliza | Clifford | Software Engineer | 5500 | NULL | | 6 | Nancy | Newman | Software Engineer | 5500 | NULL | | 7 | Melinda | Clifford | Project Manager | 8500 | NULL | | 8 | Harley | Gilbert | Software Architect | 8000 | NULL | ---- ------------ ----------- ------------------------ -------- ------- You can specify more than one conditions in WHERE clause using AND, OR and IN() as mentioned in article on SELECT statement.

It is possible, and fairly easy, to update multiple rows of a My SQL table at the same time, with different values for each row.

To understand and grasp the example we create a update query "UPDATE emp_table SET emp_name = 'amar' WHERE emp_name = 'sandeep' AND emp_designation = 'programmer'".

The update table is used to modify any field value of any My SQL table in PHP.

PHP SQL Update is used to execute the mysql _update () function that modify the table structure and set the new value for the existing value on the condition specified in Where Clause.

Understand with Example This example illustrates an example from 'PHP SQL Update'.

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Sometimes you may not want to replace existing values and only want to make adjustments to existing values.

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