本篇文章为大家展示了MySQL如何修改int类型为bigint SQL语句拼接，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

SELECT

CONCAT(

"alter table ",

TABLE_SCHEMA,

".",

TABLE_NAME,

" modify ",

COLUMN_NAME,

" bigint(20)",

IF

( IS_NULLABLE = 'NO', " NOT NULL", "" ),

IF

( EXTRA = "", "", " AUTO_INCREMENT" ),

IF

( COLUMN_DEFAULT IS NULL, "", CONCAT( " DEFAULT ", COLUMN_DEFAULT ) ),

IF

( COLUMN_COMMENT = "", "", CONCAT( " COMMENT '", COLUMN_COMMENT, "'" ) ),

";"

) AS alter_sql

FROM

information_schema.COLUMNS

WHERE

( COLUMN_NAME = 'orderid' OR COLUMN_NAME = 'order_id' )

AND DATA_TYPE = 'int';

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