sc2 expansions

from Studentinfo as Swhere S.studentid not in ( --Students taking teacher's course SELECT Sc.studentid from Scoreinfo as SC INNER JOIN Courseinfo as C on sc.courseid = C.courseid INNER JOIN Teacherinfo as T on c.teacherid = T.teacherid and T.teachername = ' Miss Zhang ');--15, the inquiry has studied the Chinese also learned the student information of mathematics select S. ' Stud Entid ' as student number, S. ' Studentname ' as student's name, S. ' Studentgender ' as student gender, S. ' Stu

GlusterFS File System [Root @ master3 ~] # Wget-P/etc/yum. repos. d [Root @ master3 ~] # Yum install-y glusterfs-fuse [Root @ master3 ~] # Mkdir-p/mnt/models [Root @ master3 ~] # Mount-t glusterfs-o ro glusterfs1: models/mnt/models/ 2. view results [Root @ master3 ~] # Df-h Filesystem Size Used Avail Use % Mounted on /Dev/vda3 289G 5.6G 284G 2%/ Devtmpfs 3.9G 0 3.9G 0%/dev Tmpfs 3.9G 80 K 3.9G 1%/dev/shm Tmpfs 3.9G 169 M 3.7G 5%/run Tmpfs 3.9G 0 3.9G 0%/sys/fs/cgroup /Dev/vda1 1014 M 128 M 887

-3.7.17-1.el7.x86_64.rpm glusterfs-fuse-3.7.17-1.el7.x86_64.rpm-->mkdir-p/mnt/models-->mount-t glusterfs-o ro glusterfs1:models/mnt/models/2. View Effects-->df-hDf-htFilesystem Type Size used Avail use% mounted on/dev/sda2 ext4 50G 1.5G 46G 4%/Devtmpfs Devtmpfs 904M 0 904M 0%/devTmpfs tmpfs 913M 0 913M 0%/dev/shmTmpfs tmpfs 913M 8.8M 904M 1%/runTmpfs tmpfs 913M 0 913M 0%/sys/fs/cgroup/dev/sda6 ext4 35G 4.7G 29G 15%/var/dev/sda3 ext4 9.8G 37M 9.2G 1%/Home/DEV/SDA1 ext4 477M 94M 354M 21%/bootTmpfs

;Select * From t_ SC;SelectSc1.s _ id from t_ SC SC1, t_ SC SC2 where sc1.s _ id = sc2.s _ id and sc1.c _ id ='001' and sc2.c _ id = '002' and sc1.score> sc2.score;-- 2. query the student ID and average score of students whose average score is greater than 60;Select s_id, AVG (score) average score from t_ SC group by s

count (distinct cno)> = 2 ) SC Where S. SNO = SC. SNO 4. List the student IDs of all students whose scores are higher than those of students whose scores are equal to those of the course No. -- Implementation code:Select SC. sno from SC,(Select sc1.sno from(Select SC. sno, SC. scgrade from SC, c where SC. cno = c. cno and c. cname = '1') sc1,(Select SC. sno, SC. scgrade from SC, c where SC. cno = c. cno and c. cname = '1') sc2,Where sc1.sno =

earlier chapters,we would see that they is really expansions. Given a home directory that's looks like this:We could carry out the following expansions:And:or even:And looking beyond our home directory:Pathname Expansion of Hidden FilesAs we know,filenames that begin with a period character is hidden. Pathname expansion also respects this behavior. An expansion such as:echo*Does not reveal hidden files.It might appear at first glance so we could incl

count (sc2.id) num3, info. fouth_area as areacode from jd_safe_check SC2 inner join jd_company C on C. ID = sc2.par _ Id2Inner join fk_user_info info on info. ID = sc2.user _ idWhere sc2.is _ deleted = 0And sc2.father _ id is not

SNAME FROM S Where not exists ( Select * from SC, C Where SC. CNO = C. CNO And cname = 'lilim' And SC. SNO = S. SNO) 2. List the names and average scores of students whose two or more courses fail. -- Implementation code: Select S. SNO, S. SNAME, AVG_SCGRADE = AVG (SC. SCGRADE) From s, SC ,( Select SNO FROM SC Where SCGRADE GROUP BY SNO Having count (distinct cno)> = 2 ) A Where S. SNO = A. sno and SC. SNO = A. SNO Group by s. SNO, S. SNAME 3. List the names of all students who have learned co

from S Where not exists ( Select * from SC, c Where SC. CNO = C. CNO And cname = 'lilim' And SC. Sno = S. SnO) 2. List the names and average scores of students whose two or more courses fail. -- Implementation code: Select S. Sno, S. sname, avg_scgrade = AVG (SC. scgrade) From S, SC ,( Select SnO From SC Where scgrade Group by SnO Having count (distinct CNO)> = 2 ) A where S. Sno = A. SnO and SC. Sno = A. SnO Group by S. Sno, S. sname 3. List the names of all students who have learned course 1

System.Object instance is the same instance. Parameters://OBJB: The second System.Object to compare. Obja: The first System.Object to compare. Returns the result://True if Obja is the same instance as OBJB, or False if both are null references. public static bool ReferenceEquals (object Obja, Object OBJB); }}Three methods for equality of comparisons are defined in System.Object. There is also an operator (= =) that can compare references or compare values.Here is a detai

. List "1" class scores than the "2" students who have high grades of the student's school number Select S.sno,s.snameFrom S, (Select SC1. SNOFrom SC sc1,c c1,sc sc2,c C2Where SC1. Cno=c1. CNO and c1.name= ' 1 'and SC2. Cno=c2. CNO and C2.name= ' 2 'and SC1. SCGRADE>SC2. Scgrade) SC Where S.SNO=SC. SNO5. List the scores of all students with "1" class scores hig

Today, I accidentally sawCodeMaybe I have never seen it. I think it's new. I just wrote the following code. Maybe I 've seen it, Maybe I forgot ...... Haha, let's make a souvenir on your own ...... I found that the singleton mode is good ...... Using System; Namespace Ca_staticconstructor { Class Staticclass { Public Static Staticclass instance { Get ; Set ;} Public String Name { Get ;Set ;} Static Staticclass (){ If(Instance =Null) { Instance = New Staticclass (); } }} Clas

; } @OverrideprotectedObject Clone ()throwsclonenotsupportedexception {Object obj=Super. Clone (); returnobj; }} PackageCom.lz.prototype;Importjava.util.Date; Public classShallowtest { Public Static voidMain (string[] args) {Shallowclone SC1=NewShallowclone ("Laro", 20,NewDate ()); System.out.println (SC1); System.out.println (Sc1.getname ()); System.out.println (Sc1.getage ()); System.out.println (Sc1.getdate ()); Shallowclone SC