Answers for "mysql change default value"

SQL
3

mysql how to change default charset

ALTER DATABASE databasename CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ALTER TABLE tablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
Posted by: Guest on June-25-2020
3

mysql modify default value

ALTER TABLE tbl_name ALTER column_name SET DEFAULT new_value;
Posted by: Guest on July-20-2021
1

mysql how to change default charset

mysql> SHOW VARIABLES LIKE 'char%'; SHOW VARIABLES LIKE 'collation%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8mb4                    |
| character_set_connection | utf8mb4                    |
| character_set_database   | utf8mb4                    |
| character_set_filesystem | binary                     |
| character_set_results    | utf8mb4                    |
| character_set_server     | utf8mb4                    |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)

+----------------------+--------------------+
| Variable_name        | Value              |
+----------------------+--------------------+
| collation_connection | utf8mb4_general_ci |
| collation_database   | utf8mb4_unicode_ci |
| collation_server     | utf8mb4_unicode_ci |
+----------------------+--------------------+
3 rows in set (0.00 sec)
Posted by: Guest on June-25-2020
0

how to remove default in mysql

ALTER TABLE "table_name" ALTER COLUMN "name_column" DROP DEFAULT;
Posted by: Guest on August-07-2020
2

mysql default value

CREATE TABLE table_name(
   column_name data_type,
   Column_name data_type DEFAULT ‘value’
);
Posted by: Guest on April-15-2020

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