SHOW FULL COLUMNS FROM `pre_column`
SHOW CREATE TABLE `pre_column`
SELECT * FROM `pre_column` `t` WHERE `t`.`id`='100921' LIMIT 1
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危地马拉SELECT * FROM `pre_column` `t` WHERE `t`.`id`='100921' LIMIT 1
SELECT colid,classify FROM {{column_relation}} WHERE tocolid = 100282 AND classify IN ('belongx','belongs','belongd') order BY colid DESC
SELECT id,title FROM {{column}} WHERE id IN (0,100282,100921) ORDER BY FIELD(id, 0,100282,100921)