SELECT a.vin,IF(b.mainKeyUUID is null,'3','4') bs from (SELECT vin,vehicleDesc,mainKeyUUID from epc_vin_sence WHERE brandName = '解放')a LEFT JOIN (SELECT DISTINCT mainKeyUUID from ( SELECT mainKeyUUID from epc_bom_sence_faw001 GROUP BY mainKeyUUID UNION SELECT mainKeyUUID from epc_bom_sence_faw002 GROUP BY mainKeyUUID UNION SELECT mainKeyUUID from epc_bom_sence_faw003 GROUP BY mainKeyUUID) p) b on a.mainKeyUUID = b.mainKeyUUID) LIMIT 100 > 1815 - [20002, 2023053110003417201624009803151352662] : line 1:1: syntax error, error in :' = b.mainKeyUUID) LIMIT 100, pos 439, line 8, column 34, token ) 检查错误点并修正

请尝试如下修正：

SELECT a.vin, IF(b.mainKeyUUID IS NULL, '3', '4') bs 
FROM (SELECT vin, vehicleDesc, mainKeyUUID FROM epc_vin_sence WHERE brandName = '解放') a 
LEFT JOIN (
    SELECT DISTINCT mainKeyUUID 
    FROM (
        SELECT mainKeyUUID FROM epc_bom_sence_faw001 GROUP BY mainKeyUUID 
        UNION 
        SELECT mainKeyUUID FROM epc_bom_sence_faw002 GROUP BY mainKeyUUID 
        UNION 
        SELECT mainKeyUUID FROM epc_bom_sence_faw003 GROUP BY mainKeyUUID
    ) p
) b 
ON a.mainKeyUUID = b.mainKeyUUID 
LIMIT 100;

修正的主要问题在于查询语句中多余的右括号，已经删除。同时，将LIMIT子句移动到查询语句的最后。