扩展这个答案，可以进一步编写一个函数，根据表是否存在返回TRUE/FALSE:

CREATE FUNCTION fn_table_exists(dbName VARCHAR(255), tableName VARCHAR(255))
  RETURNS BOOLEAN
  BEGIN
    DECLARE totalTablesCount INT DEFAULT (
      SELECT COUNT(*)
      FROM information_schema.TABLES
      WHERE (TABLE_SCHEMA COLLATE utf8_general_ci = dbName COLLATE utf8_general_ci)
        AND (TABLE_NAME COLLATE utf8_general_ci = tableName COLLATE utf8_general_ci)
    );
    RETURN IF(
      totalTablesCount > 0,
      TRUE,
      FALSE
    );
END
;


SELECT fn_table_exists('development', 'user');

下面是一个不是SELECT * FROM的表

SHOW TABLES FROM `db` LIKE 'tablename'; //zero rows = not exist

这是从一个数据库专家那里得到的，这是我被告知的:

select 1 from `tablename`; //avoids a function call
select * from INFORMATION_SCHEMA.tables where schema = 'db' and table = 'table' // slow. Field names not accurate
SHOW TABLES FROM `db` LIKE 'tablename'; //zero rows = does not exist

只是添加一个额外的方法来做它，这取决于你需要它的原因，你可以使用一个处理er_no_such_table错误:1146的处理程序，如下所示:

DELIMITER ;;
CREATE PROCEDURE `insert_in_my_table`(in my_var INT)
BEGIN
   -- Error number for table not found
   DECLARE CONTINUE HANDLER FOR 1146
   BEGIN
      -- table doesn't exists, do something...
      CREATE TABLE my_table(n INT);
      INSERT INTO my_table (n) values(my_var);
   END;
      -- table does exists, do something...
      INSERT INTO my_table (n) values(my_var);
END ;;
DELIMITER ;

如果存在则返回1，不存在则返回0。

set @ret = 0; 
SELECT 1 INTO @ret FROM information_schema.TABLES 
         WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'my_table'; 
SELECT @ret;

可以放入mysql函数中

DELIMITER $$
CREATE FUNCTION ExistTable (_tableName varchar(255))
RETURNS tinyint(4)
SQL SECURITY INVOKER
BEGIN
  DECLARE _ret tinyint;
  SET _ret = 0;
  SELECT
    1 INTO _ret
  FROM information_schema.TABLES
  WHERE TABLE_SCHEMA = DATABASE()
  AND TABLE_NAME = _tablename LIMIT 1;
  RETURN _ret;
END
$$
DELIMITER ;

并称之为

Select ExistTable('my_table');

如果存在则返回1，如果不存在则返回0。

这是我的“去”EXISTS过程，检查临时表和正常表。此过程适用于MySQL 5.6及以上版本。@DEBUG参数是可选的。默认模式是假设的，但是可以在@s语句中连接到表。

drop procedure if exists `prcDoesTableExist`;
delimiter #
CREATE PROCEDURE `prcDoesTableExist`(IN pin_Table varchar(100), OUT pout_TableExists BOOL)
BEGIN
    DECLARE `boolTableExists` TINYINT(1) DEFAULT 1;
    DECLARE CONTINUE HANDLER FOR 1243, SQLSTATE VALUE '42S02' SET `boolTableExists` := 0;
        SET @s = concat('SELECT null FROM `', pin_Table, '` LIMIT 0 INTO @resultNm');
    PREPARE stmt1 FROM @s;
    EXECUTE stmt1;
    DEALLOCATE PREPARE stmt1;
    set pout_TableExists = `boolTableExists`; -- Set output variable
    IF @DEBUG then
        select IF(`boolTableExists`
            , CONCAT('TABLE `', pin_Table, '` exists: ', pout_TableExists)
            , CONCAT('TABLE `', pin_Table, '` does not exist: ', pout_TableExists)
        ) as result;
    END IF;
END #
delimiter ;

下面是@debug on的示例调用语句:

set @DEBUG = true;
call prcDoesTableExist('tempTable', @tblExists);
select @tblExists as '@tblExists';

变量@tblExists返回一个布尔值。

这里的答案有几个问题需要注意:

1) INFORMATION_SCHEMA。TABLES不包括TEMPORARY表。

2)使用任何类型的SHOW查询，即SHOW TABLES LIKE 'test_table'，将强制返回一个结果集到客户端，这是检查表是否存在服务器端的不希望的行为，从存储过程中也返回一个结果集。

3)正如一些用户提到的，你必须小心如何使用SELECT 1 FROM test_table LIMIT 1。

如果你这样做:

SET @table_exists = 0;
SET @table_exists = (SELECT 1 FROM test_table LIMIT 1);

如果表中没有行，则不会得到预期的结果。

下面是一个适用于所有表(甚至是TEMPORARY表)的存储过程。

它可以这样使用:

SET @test_table = 'test_table';
SET @test_db = NULL;
SET @does_table_exist = NULL;

CALL DoesTableExist(@test_table, @test_db, @does_table_exist);

SELECT @does_table_exist;

代码:

/*
    p_table_name is required
    p_database_name is optional
        if NULL is given for p_database_name, then it defaults to the currently selected database
    p_does_table_exist
        The @variable to save the result to

    This procedure attempts to
        SELECT NULL FROM `p_database_name`.`p_table_name` LIMIT 0;

    If [SQLSTATE '42S02'] is raised, then
        SET p_does_table_exist = 0
    Else
        SET p_does_table_exist = 1

    Info on SQLSTATE '42S02' at:
        https://dev.mysql.com/doc/refman/5.7/en/server-error-reference.html#error_er_no_such_table
*/

DELIMITER $$

DROP PROCEDURE IF EXISTS DoesTableExist
$$

CREATE PROCEDURE         DoesTableExist (
    IN p_table_name VARCHAR(64),
    IN p_database_name VARCHAR(64),
    OUT p_does_table_exist TINYINT(1) UNSIGNED
)
BEGIN
    /* 793441 is used in this procedure for ensuring that user variables have unique names */

    DECLARE EXIT HANDLER FOR SQLSTATE '42S02'
    BEGIN
        SET p_does_table_exist = 0
        ;
    END
    ;


    IF p_table_name IS NULL THEN
        SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'DoesTableExist received NULL for p_table_name.';
    END IF;


    /* redirect resultset to a dummy variable */

    SET @test_select_sql_793441 = CONCAT(
        "SET @dummy_var_793441 = ("
            " SELECT"
                " NULL"
            " FROM ",
                IF(
                    p_database_name IS NULL,
                    "",
                    CONCAT(
                        "`",
                        REPLACE(p_database_name, "`", "``"),
                        "`."
                    )
                ),
                "`",
                REPLACE(p_table_name, "`", "``"),
                "`"
            " LIMIT 0"
        ")"
    )
    ;

    PREPARE _sql_statement FROM @test_select_sql_793441
    ;
    SET @test_select_sql_793441 = NULL
    ;
    EXECUTE _sql_statement
    ;
    DEALLOCATE PREPARE _sql_statement
    ;

    SET p_does_table_exist = 1
    ;
END
$$

DELIMITER ;