MySQL isn’t inserting binary data properly? Which datatype should be used?

For this, use BIT data type. Let us first create a table −

mysql> create table DemoTable(binaryValue BIT(5));
Query OK, 0 rows affected (0.83 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values(10);
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable values(15);
Query OK, 1 row affected (0.15 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output. Now you can see the records aren’t visible −

+-------------+
| binaryValue |
+-------------+
|             |
|             |
+-------------+
2 rows in set (0.00 sec)

To display the above records (binary data), you need to use bin() −

mysql> select bin(binaryValue) from DemoTable;

This will produce the following output >

+------------------+
| bin(binaryValue) |
+------------------+
| 1010             |
| 1111             |
+------------------+
2 rows in set (0.00 sec)

Let us now see another example.

Following is the query to insert binary data, but the values aren’t visible when select is used −

mysql> insert into DemoTable VALUES (b'1010'),(b'1111');
Query OK, 2 rows affected (0.52 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> select *from DemoTable;
+-------------+
| binaryValue |
+-------------+
|             |
|             |              
|             |
|             |
+-------------+
4 rows in set (0.00 sec)

Let us check the table records once again and use bin() to display −

mysql> select bin(binaryValue) from DemoTable;

This will produce the following output −

+------------------+
| bin(binaryValue) |
+------------------+
| 1010             |
| 1111             |
| 1010             |
| 1111             |
+------------------+
4 rows in set (0.00 sec)

Updated on: 22-Aug-2019

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