how to change default value in mysql code example

Example 1: 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;

Example 2: set default value mysql db

ALTER TABLE mytbl ALTER j SET DEFAULT 1000;

Example 3: mysql default value

CREATE TABLE table_name(
   column_name data_type,
   Column_name data_type DEFAULT ‘value’
);

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