SQL - how to alter info of a cell in table Post: 302966956

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Special Forums UNIX and Linux Applications SQL - how to alter info of a cell in table Post 302966956 by baris35 on Thursday 18th of February 2016 08:48:20 AM

02-18-2016

Registered User

SQL - how to alter info of a cell in table

Hello,
I am newbie on mysql and trying to edit my database from terminal under linux.
What I need to do is to change the information written in a cell in table.
Let me explain what I tried:

Code:

$ mysql -u mysqluser -p
$ show databases;
$ USE catalogue;
$ show tables ;
$ select * from phonebook;

it shows something like this:

+-------------+------------+--------+
| id | friend_name | age |
+-------------+------------+--------+
| 1 | Jaxier | 18 |
| 2 | Johanna | 26 |
| 3 | Johny | 25 |
| 4 | Lacatus | 18 |
| 5 | Julia | 25 |
+-------------+------------+---------+

What I want to do is to set age of Lacatus from 18 to 58

I tried below commands:

1)

Code:

$ update phonebook set id 4 SET age 58;

gives syntax error.

2)

Code:

$  ALTER phonebook ALTER id ALTER 4 SET age 58;

I 'd appreciate if you could explain what I should run in terminal

Thanks in advance
Boris

baris35

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LEARN ABOUT CENTOS

alter_tablespace

ALTER 
TABLESPACE(7)					  PostgreSQL 9.2.7 Documentation				       ALTER TABLESPACE(7)

NAME

       ALTER_TABLESPACE - change the definition of a tablespace

SYNOPSIS

       ALTER TABLESPACE name RENAME TO new_name
       ALTER TABLESPACE name OWNER TO new_owner
       ALTER TABLESPACE name SET ( tablespace_option = value [, ... ] )
       ALTER TABLESPACE name RESET ( tablespace_option [, ... ] )

DESCRIPTION

       ALTER TABLESPACE changes the definition of a tablespace.

       You must own the tablespace to use ALTER TABLESPACE. To alter the owner, you must also be a direct or indirect member of the new owning
       role. (Note that superusers have these privileges automatically.)

PARAMETERS

       name
	   The name of an existing tablespace.

       new_name
	   The new name of the tablespace. The new name cannot begin with pg_, as such names are reserved for system tablespaces.

       new_owner
	   The new owner of the tablespace.

       tablespace_parameter
	   A tablespace parameter to be set or reset. Currently, the only available parameters are seq_page_cost and random_page_cost. Setting
	   either value for a particular tablespace will override the planner's usual estimate of the cost of reading pages from tables in that
	   tablespace, as established by the configuration parameters of the same name (see seq_page_cost, random_page_cost). This may be useful
	   if one tablespace is located on a disk which is faster or slower than the remainder of the I/O subsystem.

EXAMPLES

       Rename tablespace index_space to fast_raid:

	   ALTER TABLESPACE index_space RENAME TO fast_raid;

       Change the owner of tablespace index_space:

	   ALTER TABLESPACE index_space OWNER TO mary;

COMPATIBILITY

       There is no ALTER TABLESPACE statement in the SQL standard.

SEE ALSO

       CREATE TABLESPACE (CREATE_TABLESPACE(7)), DROP TABLESPACE (DROP_TABLESPACE(7))

PostgreSQL 9.2.7						    2014-02-17						       ALTER TABLESPACE(7)

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