Database error: [Table 'ac_posts' is marked as crashed and should be repaired]

SELECT a.*, b.post_content FROM ac_posts a INNER JOIN ac_posts_content b ON a.ID = b.ID WHERE a.ID IN(19810,19823,19844,1173237,1434038,1578424,1814304,3014482,3205558,3205560,3866722,4195519,366507,649683,781974,848387,920128,1814559,2236495,2253775) ORDER BY FIELD(a.ID, 19810,19823,19844,1173237,1434038,1578424,1814304,3014482,3205558,3205560,3866722,4195519,366507,649683,781974,848387,920128,1814559,2236495,2253775);