mysql删除表循环语句表名后缀递增
MySQL是一个关系型数据库管理系统,可以通过SQL语句来操作和管理数据库中的数据。在MySQL中,可以使用DELETE语句来删除表中的数据。如果需要循环删除多个表,可以使用循环语句来实现,通过递增的表名后缀来删除多个表。下面列举了10个符合题目要求的循环语句表名后缀递增的示例。
1. 使用WHILE循环语句:
```sql
SET @suffix = 1;
WHILE @suffix <= 10 DO
    SET @table_name = CONCAT('table_', @suffix);
    SET @sql = CONCAT('DROP TABLE IF EXISTS ', @table_name, ';');
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
    SET @suffix = @suffix + 1;
END WHILE;
```
2. 使用FOR循环语句:
```sql
FOR @suffix IN 1..10 DO
    SET @table_name = CONCAT('table_', @suffix);
    SET @sql = CONCAT('DROP TABLE IF EXISTS ', @table_name, ';');
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
END FOR;
```
3. 使用REPEAT循环语句:
```sql
SET @suffix = 1;
REPEAT
    SET @table_name = CONCAT('table_', @suffix);
    SET @sql = CONCAT('DROP TABLE IF EXISTS ', @table_name, ';');
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
    SET @suffix = @suffix + 1;
UNTIL @suffix > 10 END REPEAT;
```
4. 使用LOOP循环语句:
```sql
SET @suffix = 1;
LOOP
    SET @table_name = CONCAT('table_', @suffix);
    SET @sql = CONCAT('DROP TABLE IF EXISTS ', @table_name, ';');
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
    SET @suffix = @suffix + 1;
    IF @suffix > 10 THEN
        LEAVE;
    END IF;
END LOOP;
```
5. 使用CURSOR游标循环语句:
```sql
DECLARE done INT DEFAULT FALSE;
DECLARE table_suffix INT;
DECLARE table_name VARCHAR(50);
DECLARE cur CURSOR FOR SELECT suffix FROM table_suffixes;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
OPEN cur;
read_loop: LOOP
    FETCH cur INTO table_suffix;
    IF done THEN
        LEAVE read_loop;
    END IF;
    SET table_name = CONCAT('table_', table_suffix);
    SET @sql = CONCAT('DROP TABLE IF EXISTS ', table_name, ';');
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
END LOOP;
CLOSE cur;
```
6. 使用CASE语句组合循环语句:
```sql
SET @suffix = 1;
CASE WHEN @suffix <= 10 THEN
    SET @table_name = CONCAT('table_', @suffix);
    SET @sql = CONCAT('DROP TABLE IF EXISTS ', @table_name, ';');
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
    SET @suffix = @suffix + 1;
END CASE;
```
7. 使用IF语句循环递增:mysql中delete语句
```sql
SET @suffix = 1;
IF @suffix <= 10 THEN
    SET @table_name = CONCAT('table_', @suffix);
    SET @sql = CONCAT('DROP TABLE IF EXISTS ', @table_name, ';');
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
    SET @suffix = @suffix + 1;
END IF;
```
8. 使用GOTO语句循环递增:
```sql
SET @suffix = 1;
label: IF @suffix <= 10 THEN

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