and 1=1 ,and 1=2这是什么语言?有什么含义?

and 1=1 ,and 1=2这是什么语言?有什么含义? 以下这段DB2的SQL文 应该如何理解SELECT * FROM aa WHERE a IN ('1','2','3','4') AND b = '000' AND c = '0B' AND d = '00' AND ((e = '0' AND f '6' AND (g > '20130816' OR (h = '20130816' AND i > '1044')) AND j '****') OR (k = '1' AND l = '1')) 谁知道这是什么公式?function CalPlayerNextLvExp(Lv)--local result = 0;if Lv >= 1 and Lv = 11 and Lv = 21 and Lv = 31 and Lv and变1个字母是什么单词 oracle and里面嵌套and问题我想知道and()这个语法是什么意思?还有and t22.busType in ('4','6','7') or t11.maType'2'这个语法是什么意思?and t22.num is not null and (t11.type in ('1','2') and t11.maType='2' and t22.busType 请问高手这个公式有未来函数吗?var1:=CLOSE>REF(CLOSE,1) AND CLOSE>REF(CLOSE,2);Var2:=REF(Var1,1) AND CLOSE=REF(CLOSE,2);Var3:=REF(Var2,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE=REF(CLOSE,1) AND CLOSE=REF(CLOSE,1) AND CLOSE=REF(CLOSE,1) AND CLO Up And Down (Parts 1 And 2) 歌词 1)if 1-cosy=0.2 and excel中=AND($A1,B$1 clk‘event and clk=’1‘ VHDL 函数中*and什么意思IF((L8>=0)*AND(M8>=0)*AND(L8+M8>0)*AND(K6=1),R正确,IF((L8 IF(AND(F>=5,G>=5),1,IF(AND(F>=1,G>=1),2,IF(AND(F EXCEL公式太长怎么办=IF(OR(AND($DP5=1,DQ5=1),AND($DP5=2,DQ5=2),AND($DP5=3,DQ5=3),AND($DP5=4,DQ5=4),AND($DP5=5,DQ5=5),AND($DP5=6,DQ5=6),AND($DP5=7,DQ5=7),AND($DP5=8,DQ5=8)),1,IF(OR(AND($DP5=1,DQ5=2),AND($DP5=2,DQ5=1),AND($DP5=3,DQ5=4),AND($DP5 A bird has (1)feathers and wings (2)paws and fur(3)fingers and feet =AND(LEN(A1)=18,COUNTIF(A:A,A1&*)=1),这个公式是什么含义? 英语翻译1：one and a half apple2:one apple and a half第三种是什么 if tan(1/2)x=2/5 and field-scale For field-scale datasets,the PLSR predictive models provided approximate quantitative EC estimations (R2=0.8 and RPD=2.2) for grids 1 and 6 and poorestimations for grids 2,3,4 and 5.