I have to add a column whose default value is not null by default to the table after particular column using Alter table.
ALTER TABLE tblechecklistrevision ADD COLUMN IWorkFlowOrder INT(10) DEFAULT NOT NULL AFTER fState;
When I Execute the query I will get the below error
You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near 'NOT NULL AFTER fState' at line 1
You should remove DEFAULT:
ALTER TABLE tblechecklistrevision
ADD COLUMN IWorkFlowOrder INT(10) NOT NULL AFTER fState;
DEFAULT is for setting initial value to new rows where a value for that column isn't specified, when you write ...INT(10) NOT NULL what you mean is actually that that column can never contain a NULL, not only at initialization time.
If you want the default value not to equal NULL (example 0) you can do:
ALTER TABLE tblechecklistrevision
ADD COLUMN IWorkFlowOrder INT(10) NOT NULL DEFAULT 0 AFTER fState
Related
I want to edit a column in a MySQL table. Right now, it is tinyint with value NULL. I want to change the value to '0'. I tried using this expression:
ALTER TABLE hosts MODIFY COLUMN hide TINYINT NOT NULL DEFAULT 1;
and this
ALTER TABLE hosts MODIFY COLUMN hide TINYINT DEFAULT 1 NOT NULL;
and more variations. But this didn't work for me..
I get this error
EXECUTE FAIL:
ALTER TABLE hosts MODIFY COLUMN hide TINYINT(1) DEFAULT 0 NOT NULL
Message :
Invalid use of NULL value
What's the problem and what is the correct statement?
You cannot alter the table to „not null“ as long as you have data in it with null value.
First set all you data to 0
Update hosts set hide = 0 where hide is null
I want to change my field name to default Null but i am unable to solve this issue Here i am trying to change my deleteAt field to defaut Null but its giving me the error
Syntax error or access violation: 1064 You have an
error in your SQL syntax; check the manual that
corresponds to your MariaDB server version for the right syntax to use near
'deletedAt timestamp default NULL' at
line 1
Here is my code
DB::statement('ALTER TABLE insurance CHANGE COLUMN deleted_at deletedAt timestamp default NULL');
I want to set default NULL but i am unable to solve this and i am confused about this issue. your help need here
Try this
ALTER TABLE `insurance` CHANGE COLUMN `deleted_at`
`deleted_at` TIMESTAMP NULL DEFAULT NULL;
ALTER TABLE insurance CHANGE COLUMN deleted_at deletedAt timestamp default NULL
Is incorrect.
Use this please.
ALTER TABLE insurance MODIFY COLUMN deleted_at timestamp NULL DEFAULT NULL
The word deletedAt isn't a valid syntax. There is an error in your query.
I can't figure out why my alter table query throws an error. Currently, this is a (DATETIME) column with default value NULL.
My wish is to alter it so datetime value gets automatically populated when I update a row. I'm trying to write an alter statement, but I can't figure out why mine is throwing the error.
My alter statement
ALTER TABLE `mydb`.`orders` CHANGE COLUMN `date_u` DATETIME NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP '{}';
And this is the error that I'm getting
16:28:34 ALTER TABLE `mydb`.`orders` CHANGE COLUMN `date_u` DATETIME NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP '{}' Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP '{}'' at line 1 0.00041 sec
I'm using MySQL version 5.7
The CHANGE COLUMN alteration is used when you might want to change the name of the column, and requires you to provide the new name after the old name. If you're not renaming the column, you have to provide the name twice. Your command tries to rename the date_u column to DATETIME, and it's missing the datatype before the NULL keyword.
Use MODIFY COLUMN instead. It's the same, but doesn't allow renaming, so doesn't require you to give the column name twice.
ALTER TABLE `mydb`.`orders` MODIFY COLUMN `date_u` DATETIME NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP;
I'm also not sure what you intended with '{}' at the end, but I don't think it's valid syntax, either, so I've removed it.
You're missing to name the new column.
change this:
ALTER TABLE `mydb`.`orders`
CHANGE COLUMN `date_u` DATETIME NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP '{}';
into this:
ALTER TABLE `mydb`.`orders`
CHANGE COLUMN `date_u` `date_u` DATETIME NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP;
Notice the column name is typed twic, because you want the column name to stay the same, formerly here's the change column syntax:
ALTER TABLE `table_name`
CHANGE COLUMN `column_name` `column_new_name` (...);
Or, you can just you modify column syntax:
ALTER TABLE `mydb`.`orders` MODIFY COLUMN `date_u` DATETIME NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP;
Ps: I don't get what you mean by '{}' so I removed it because I think it's not a valid syntax.
Hope I pushed you further.
I am trying to alter a table and set a default value for a nullable column. But i get the following error.
Here is the command:
ALTER TABLE `questiontboard`.`questions`
CHANGE COLUMN `status` `status` (11) NULL DEFAULT 1 ;
Here is the error:
ERROR 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(11) NULL DEFAULT 1' at line 2
SQL Statement:
ALTER TABLE `questionboard`.`questions`
CHANGE COLUMN `status` `status` (11) NULL DEFAULT 1
ERROR: Error when running failback script. Details follow.
ERROR 1050: Table 'question' already exists
What am i doing wrong?
You forgot the data type. Did you mean
ALTER TABLE `questiontboard`.`questions`
CHANGE COLUMN `status` `status` INT(11) NULL DEFAULT 1 ;
^^^
Your query should be this:
ALTER TABLE `questiontboard`.`questions`
CHANGE COLUMN `status` `status` int(11) NULL DEFAULT 1 ;
^^ here add int as you want the datatype
You are missing datatype of field in the query.
I got the same error when altering a table. I did the exact same thing you did (minus the code typo).
I got the error when altering a column from a SMALLINT to a varchar(n). It gives the "1050 Table already exists..." error. The error was confusing. Of course the table exists, that's why I'm trying to alter it!
In the end, I found out that the problem was that my new varchar(2) was not big enough to hold all the original smallint data. I had one row that had a 4 digit number, so varchar(2) wouldn't work. I changed it to use varchar(4), and it worked.
ALTER TABLE omiccom_wp.myTable
CHANGE COLUMN myColumn myColumn VARCHAR(2) NOT NULL DEFAULT '0' ;
Is it possible to insert columns into a MySQL table??
I've created a table and named it "my_table" - I do not understand, why MySQL does not eats my syntax...
INSERT INTO "my_table"(
"item" char(1) NOT NULL DEFAULT '',
"price" int(10) NOT NULL DEFAULT '3000',
"level" int(10) NOT NULL DEFAULT '1000',
"super" char(1) NOT NULL DEFAULT '',
"play" char(1) NOT NULL DEFAULT ''
)
Error message:
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '"my_table"( "item" char(1) NOT NULL DEFAULT '', "price" i' at line 1
So what's wrong with my syntax ?
If you're trying to add columns to an already created table you must use ALTER.
ALTER TABLE my_table ADD item char(1) NOT NULL DEFAULT '';
http://dev.mysql.com/doc/refman/5.1/en/alter-table.html
http://www.techiecorner.com/560/mysql-how-to-add-column-to-existing-table/
As the documentation says quite clearly, INSERT is for inserting rows of data, not altering the schema.
Look at ALTER instead.
And table/field names are delimited with backticks, not quotation marks.