oracle 报缺失表达式,怎么办

看了两行，发现几处问题，你先改了再说。 SQLSTR:= 'SELECT TK_ID,TK_TM,TK_XXA,TK_XXB,TK_XXC,TK_XXD,TK_XXE,TK_XXF,TK_DA,TK_KSDJ,TK_KSK M,TK_ZJ,TK_LX' || 'FROM (SELECT * FROM (SELECT * FROM t_tkxx t WHERE t.tk_lx = ''01'' AND TK_KSKM