mysql innodb 主键INT、BIGINT、VARCHAR并发插入性能对比10个并发共插入10万行 总耗时(s) 第一次 第二次 第三次NT(-2147483648-2147483647) 198.13 197.25 197.56 BIGINT(-9223372036854775808-9223372036854775807) 195.83 197.7

MySQL如何修改int类型为bigint SQL语句拼接SELECT CONCAT("alter table ",TABLE_SCHEMA,".",TABLE_NAME," modify ",COLUMN_NAME," bigint(20)", IF( IS_NULLABLE = 'NO', " NOT NULL", "" ), IF( EXTRA = ""