How to set the default value to 1 in mysql

In MySQL, the default value of a column can be set to 1 using the ALTER TABLE statement and the DEFAULT keyword. The steps are as follows: 1. Determine the table name and column name; 2. Write the ALTER TABLE statement; 3. Execute the statement.

In MySQL, the default value is set to 1

In MySQL, you can pass theALTER TABLEstatement and ## The #DEFAULTkeyword sets the column's default value to 1.

ALTER TABLE table_name ALTER COLUMN column_name SET DEFAULT 1;

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1. Determine the table name and column name

2. Write theALTER TABLEstatement

ALTER TABLEstatement, specify the table name, column name and default value.

3. Execute statement

ALTER TABLEstatement in MySQL command line or client:

mysql> ALTER TABLE my_table ALTER COLUMN my_column SET DEFAULT 1;

my_columnin a table namedmy_table, and you want to set the default value of the column to 1. Then, you need to execute the following statement:

ALTER TABLE my_table ALTER COLUMN my_column SET DEFAULT 1;

my_columncolumn will default to 1 without explicitly specifying a value.

The default value can be set to 1 only if the current data type of the column allows it. For example, if the column is of type string, you cannot set the default value to 1.
• If the column already has a default value, the
• ALTER TABLEstatement will overwrite it.
In some cases it may be necessary to use a
• NOT NULLconstraint to enforce a default value.

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