批量删表

需求：创建了64张表，需要全部删除。

# 第一步：创建存储过程
CREATE PROCEDURE drop_64_table(in val_s int, in val_e int)
begin
declare i int;
set i=val_s;
while i<=val_e do

set @sql_drop_table = concat(
"DROP TABLE xxx_task_", i);
PREPARE sql_drop_table FROM @sql_drop_table;
EXECUTE sql_drop_table;

set @sql_drop_table = concat(
"DROP TABLE xxx_record_", i);
PREPARE sql_drop_table FROM @sql_drop_table;
EXECUTE sql_drop_table;

set @sql_drop_table = concat(
"DROP TABLE xxx_achievement_", i);
PREPARE sql_drop_table FROM @sql_drop_table;
EXECUTE sql_drop_table;

set @sql_drop_table = concat(
"DROP TABLE xxx_record_", i);
PREPARE sql_drop_table FROM @sql_drop_table;
EXECUTE sql_drop_table;
set i=i+1;
end while;
end

# 第二步：执行存储过程
call drop_64_table(0,63);

# 第三步：删除存储过程
DROP PROCEDURE IF EXISTS drop_64_table

最后的说明：某些版本对 ""  或  ‘’ 有严格要求，报错的话，注意字符串的拼接。