I am using int(22) for now as my table field. but for now it's overflow with value 2147483647 and stop so my 3000 field gone the same id. I am really stuck with that
For now i changed it with bigint(20) unsigned but may be i will come same condition in future.
Please advice me what will be better use for this
varchar or bigint or any
Also would be great if i get some explanation.
Think of it this way: how long did it take you to fill up an INT? Perhaps six months?
Now multiply that time by roughly 4 billion.
That's how long it will take to fill up a BIGINT, if you insert data at the same rate. So if it took you half a year to fill an INT, the BIGINT will last 2 billion years.
That gives you some scope of how much larger the range of a BIGINT is than an INT. A BIGINT supports up to 264 values, which is 232 times larger than the number of values in an INT.
NUMERIC can store 65 digits which is larger than BIGINT UNSINGED
mysql> create table integral (a bigint, b numeric(65,0));
Query OK, 0 rows affected (0.06 sec)
mysql> insert into integral (a) values(123456789012345678901234567890);
Query OK, 1 row affected, 1 warning (0.01 sec)
mysql> show warnings;
+---------+------+--------------------------------------------+
| Level | Code | Message |
+---------+------+--------------------------------------------+
| Warning | 1264 | Out of range value for column 'a' at row 1 |
+---------+------+--------------------------------------------+
1 row in set (0.00 sec)
mysql> insert into integral (b) values(123456789012345678901234567890);
Query OK, 1 row affected (0.00 sec)
Related
I've been trying to save the product weight in a database field table with the type of decimal.
My code:
$p = Product::find($id)->update([
'weight' => $product['weight'] ? floatval($product['weight']) : null,
]);
It always rounds up the number for some reason, even though dd(floatval($product['weight'])) outputs the correct value, when i try to save it it doesn't save the correct value, only changing the field to the type of float works, but i read that it is not a correct approach.
I'm using MySQL and the Laravel 8.75.
Decimal type in MySQL has two tuning knobs: precision and scale. You omitted the scale, so it defaults to 0.
Documentation (link)
The declaration syntax for a DECIMAL column is DECIMAL(M,D). The ranges of values for the arguments in MySQL 5.1 are as follows:
M is the maximum number of digits (the precision). It has a range of 1 to 65. (Older versions of MySQL permitted a range of 1 to 254.)
D is the number of digits to the right of the decimal point (the scale). It has a range of 0 to 30 and must be no larger than M.
Example
mysql> create table test01 (field01 decimal(9));
Query OK, 0 rows affected (0.01 sec)
mysql> insert into test01 (field01) values (123.456);
Query OK, 1 row affected, 1 warning (0.00 sec)
mysql> select * from test01;
+---------+
| field01 |
+---------+
| 123 |
+---------+
1 row in set (0.00 sec)
mysql> create table test02 (field01 decimal(9, 4));
Query OK, 0 rows affected (0.00 sec)
mysql> insert into test02 (field01) values (123.456);
Query OK, 1 row affected (0.01 sec)
mysql> select * from test02;
+----------+
| field01 |
+----------+
| 123.4560 |
+----------+
1 row in set (0.00 sec)
Probably modifying the column with a migration
Schema::table('products', function (Blueprint $table) {
$table->decimal('weight', 9, 4)->change();
});
Documentation
I have a BLOB field in a MySQL database that contains a seven bit binary field - in essence, one bit for each day of the week, starting on a Sunday with the right hand bit.
I have two records, on one the binary field (called Flags) is set to 0101000 while the other is set to 0000010. I use Querious software on a Mac for database work, and that shows that the field does contain binary data and confirms the above entries.
However, when I issue a SELECT statement, that includes Flags & 8 = 8 in the WHERE statement, both records are returned, yet I believe only the first should be.
The PHP code using bindec($data->flags) & 8 correctly only marks the first record as having the 4th bit (i.e. value 8) set.
Can anyone advise what I'm doing wrong with the MySQL statement - i've been looking at this for over 36 hours now, and just cant see it.
Seems to work in fine here here (on v5.7.13)
mysql> create table z (x bit(7));
Query OK, 0 rows affected (0.02 sec)
mysql> insert into z (x) values (0b0101000), (0b000010);
Query OK, 2 rows affected (0.01 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> select cast(x & 8 as unsigned) from z;
+-------------------------+
| cast(x & 8 as unsigned) |
+-------------------------+
| 8 |
| 0 |
+-------------------------+
2 rows in set (0.00 sec)
mysql> select x, cast(x as unsigned) from z where x & 8;
+------+---------------------+
| x | cast(x as unsigned) |
+------+---------------------+
| ( | 40 |
+------+---------------------+
1 row in set (0.00 sec)
You should show your ACTUAL query.
I just want to know what is the benefit/usage of defining ZEROFILL for INT DataType in MySQL?
`id` INT UNSIGNED ZEROFILL NOT NULL
When you select a column with type ZEROFILL it pads the displayed value of the field with zeros up to the display width specified in the column definition. Values longer than the display width are not truncated. Note that usage of ZEROFILL also implies UNSIGNED.
Using ZEROFILL and a display width has no effect on how the data is stored. It affects only how it is displayed.
Here is some example SQL that demonstrates the use of ZEROFILL:
CREATE TABLE yourtable (x INT(8) ZEROFILL NOT NULL, y INT(8) NOT NULL);
INSERT INTO yourtable (x,y) VALUES
(1, 1),
(12, 12),
(123, 123),
(123456789, 123456789);
SELECT x, y FROM yourtable;
Result:
x y
00000001 1
00000012 12
00000123 123
123456789 123456789
One example in order to understand, where the usage of ZEROFILL might be interesting:
In Germany, we have 5 digit zipcodes. However, those Codes may start with a Zero, so 80337 is a valid zipcode for munic, 01067 is a zipcode of Berlin.
As you see, any German citizen expects the zipcodes to be displayed as a 5 digit code, so 1067 looks strange.
In order to store those data, you could use a VARCHAR(5) or INT(5) ZEROFILL whereas the zerofilled integer has two big advantages:
Lot lesser storage space on hard disk
If you insert 1067, you still get 01067 back
Maybe this example helps understanding the use of ZEROFILL.
It's a feature for disturbed personalities who like square boxes.
You insert
1
23
123
but when you select, it pads the values
000001
000023
000123
It helps in correct sorting in the case that you will need to concatenate this "integer" with something else (another number or text) which will require to be sorted as a "text" then.
for example,
if you will need to use the integer field numbers (let's say 5) concatenated as A-005 or 10/0005
I know I'm late to the party but I find the zerofill is helpful for boolean representations of TINYINT(1). Null doesn't always mean False, sometimes you don't want it to. By zerofilling a tinyint, you're effectively converting those values to INT and removing any confusion ur application may have upon interaction. Your application can then treat those values in a manner similar to the primitive datatype True = Not(0)
mysql> CREATE TABLE tin3(id int PRIMARY KEY,val TINYINT(10) ZEROFILL);
Query OK, 0 rows affected (0.04 sec)
mysql> INSERT INTO tin3 VALUES(1,12),(2,7),(4,101);
Query OK, 3 rows affected (0.02 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql> SELECT * FROM tin3;
+----+------------+
| id | val |
+----+------------+
| 1 | 0000000012 |
| 2 | 0000000007 |
| 4 | 0000000101 |
+----+------------+
3 rows in set (0.00 sec)
mysql>
mysql> SELECT LENGTH(val) FROM tin3 WHERE id=2;
+-------------+
| LENGTH(val) |
+-------------+
| 10 |
+-------------+
1 row in set (0.01 sec)
mysql> SELECT val+1 FROM tin3 WHERE id=2;
+-------+
| val+1 |
+-------+
| 8 |
+-------+
1 row in set (0.00 sec)
ZEROFILL
This essentially means that if the integer value 23 is inserted into an INT column with the width of 8 then the rest of the available position will be automatically padded with zeros.
Hence
23
becomes:
00000023
When used in conjunction with the
optional (nonstandard) attribute
ZEROFILL, the default padding of
spaces is replaced with zeros. For
example, for a column declared as
INT(4) ZEROFILL, a value of 5 is
retrieved as 0005.
http://dev.mysql.com/doc/refman/5.0/en/numeric-types.html
If you specify ZEROFILL for a numeric column, MySQL automatically adds the UNSIGNED attribute to the column.
Numeric data types that permit the UNSIGNED attribute also permit SIGNED. However, these data types are signed by default, so the SIGNED attribute has no effect.
Above description is taken from MYSQL official website.
I have a table in MySQL with a field that is decimal, length 9, unsigned. I'm using it for prices.
After I insert the data, and query for it, it has all been rounded and the decimal has been removed.
I'm confused as to why.
Troubleshooting tips?
Host: web.com
phpMyAdmin version: 2.11.10.1
MySQL client version: 5.0.95
Decimal type in MySQL has two tuning knobs: precision and scale. You omitted the scale, so it defaults to 0.
Documentation (link)
The declaration syntax for a DECIMAL column is DECIMAL(M,D). The ranges of values for the arguments in MySQL 5.1 are as follows:
M is the maximum number of digits (the precision). It has a range of 1 to 65. (Older versions of MySQL permitted a range of 1 to 254.)
D is the number of digits to the right of the decimal point (the scale). It has a range of 0 to 30 and must be no larger than M.
Example
mysql> create table test01 (field01 decimal(9));
Query OK, 0 rows affected (0.01 sec)
mysql> insert into test01 (field01) values (123.456);
Query OK, 1 row affected, 1 warning (0.00 sec)
mysql> select * from test01;
+---------+
| field01 |
+---------+
| 123 |
+---------+
1 row in set (0.00 sec)
mysql> create table test02 (field01 decimal(9, 4));
Query OK, 0 rows affected (0.00 sec)
mysql> insert into test02 (field01) values (123.456);
Query OK, 1 row affected (0.01 sec)
mysql> select * from test02;
+----------+
| field01 |
+----------+
| 123.4560 |
+----------+
1 row in set (0.00 sec)
I had the same problem. Turns out PHPMyAdmin ignores the decimal place if you enter and assumes it to be 0.
Use alter table query to change it.
ALTER TABLE tablename CHANGE rate rate DECIMAL(30,3) UNSIGNED NOT NULL;
THe rounding is done because may be you have set its datatype as int.
Change its datatype to double OR Float.
This will help you out.
EDIT
If you are having datatype decimal give its size like this edit.
create table numbers (a decimal(10,2));
The rounding is happening because you need to declare the precision in the type declaration
create table test01 (field01 decimal(9,2));
In PHP/MySQLAdmin go to the Structure of the table, hit change and then set the length (which defaults to 10,0) to 10,2 for financial data (dollars).
i have an existing mysql table with the id column defined as primary, and auto-increment set as true. now, i would like to know if i can set the auto-increment to start from a predefined value, say 5678, instead of starting off from 1.
I would also like to know if i can set the steps for auto-incrementing, say increase by 15 each for each new record insertion (instead of the default increment value of 1).
Note- i am using phpmyadmin to play with the db, and i have many tables but only one db.
Thanks.
ALTER TABLE tbl AUTO_INCREMENT = 5678 will set the auto increment to 5678 for that table. Have a look at the detailed information here.
You can set the auto increment value using below command
ALTER TABLE tbl_name AUTO_INCREMENT = 5678;
And can update the auto_increment counter variable using below command
SET ##auto_increment_increment=15;
Loo at here for more info
mysql> SET ##auto_increment_increment=15;
Query OK, 0 rows affected (0.00 sec)
mysql> INSERT INTO autoinc1 VALUES (NULL), (NULL), (NULL), (NULL);
Query OK, 4 rows affected (0.00 sec)
Records: 4 Duplicates: 0 Warnings: 0
mysql> SELECT col FROM autoinc1;
+-----+
| col |
+-----+
| 1 |
| 16 |
| 31 |
| 46 |
You can also use the server-system-variables:
auto_increment_increment
and
auto_increment_offset
This will allow you to increase the offset by other values than 1 (e.g. 15) each time.
If you start from a different value using the same offset on a different server. This will allow you to keep tables on different servers that can be merged without keys overlapping.
e.g.
(inc = 15 offset = 1) (inc=15 offset = 2)
table1 on server A table1 on server B
-----------------------------------------------------
id name id name
1 bill 2 john
16 monica 17 claire
....
This can be very useful.
Because the main usage is to have the same table on different servers behave in a different way, it is a server setting and not a table setting.
ALTER TABLE whatever AUTO_INCREMENT=5678 - alternatively in phpMyAdmin, go to the "Operations" tab of the table view and set it there. For the increment step, use the setting auto_increment_increment.
You can see the example here..
http://pranaydac08.blogspot.in/2013/10/how-set-auto-increment-value-start-from.html