SET FOREIGN_KEY_CHECKS = 0; 
TRUNCATE TABLE `texhibitors`;
TRUNCATE TABLE `texhibitors_texhibition_stand`;
TRUNCATE TABLE `texhibitors_tactivity_area`;
TRUNCATE TABLE `texhibitors_tinnovation`;
TRUNCATE TABLE `tactivity_area`;
TRUNCATE TABLE `tinnovation`;
TRUNCATE TABLE tatelier;
TRUNCATE TABLE tatelier_partenaire;
TRUNCATE TABLE partenaire;
TRUNCATE TABLE tatelier_tintervenat;
TRUNCATE TABLE tintervenat;
TRUNCATE TABLE tatelier_topic;
TRUNCATE TABLE topic;
TRUNCATE TABLE tatelier_tthematique;
TRUNCATE TABLE tparticipanttype;
TRUNCATE TABLE tsalle;
TRUNCATE TABLE tconferencetype_t;
TRUNCATE TABLE texhibitors_tactivity_area;
TRUNCATE TABLE tactivity_area;
TRUNCATE TABLE societe;  
TRUNCATE TABLE tmateriel;
TRUNCATE TABLE texhibitors_tthematique;
TRUNCATE TABLE tatelier_tconferencetype_t;
TRUNCATE TABLE texhibitors_tmateriel;
SET FOREIGN_KEY_CHECKS = 1;