Commit 56b92b0c authored by Greener Pat's avatar Greener Pat
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save 7.27 11:47

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Showing with 1 addition and 54 deletions
+1 -54
...@@ -114,7 +114,7 @@ int main(int argc, char *argv[]) { ...@@ -114,7 +114,7 @@ int main(int argc, char *argv[]) {
char recv_buf[MAX_MEM_BUFFER_SIZE]; char recv_buf[MAX_MEM_BUFFER_SIZE];
std::ifstream file("../test4.sql"); // 打开文件 std::ifstream file("../test2.sql"); // 打开文件
if (!file.is_open()) { if (!file.is_open()) {
std::cerr << "无法打开文件" << std::endl; std::cerr << "无法打开文件" << std::endl;
return 1; return 1;
......
create table t1(id int,name char(4));
show tables;
create table t2(id int);
show tables;
drop table t1;
show tables;
drop table t2;
show tables;
create table grade (name char(20),id int,score float);
insert into grade values ('Data Structure', 1, 90.5);
insert into grade values ('Data Structure', 2, 95.0);
insert into grade values ('Calculus', 2, 92.0);
insert into grade values ('Calculus', 1, 88.5);
select * from grade;
select score,name,id from grade where score > 90;
select id from grade where name = 'Data Structure';
select name from grade where id = 2 and score > 90;
create table grade (name char(20),id int,score float);
insert into grade values ('Data Structure', 1, 90.5);
insert into grade values ('Data Structure', 2, 95.0);
insert into grade values ('Calculus', 2, 92.0);
insert into grade values ('Calculus', 1, 88.5);
select * from grade;
update grade set score = 90 where name = 'Calculus' ;
select * from grade;
update grade set name = 'Error name' where name > 'A';
select * from grade;
update grade set name = 'Error' ,id = -1,score = 0 where name = 'Error name' and score >= 90;
select * from grade;
create table grade (name char(20),id int,score float);
insert into grade values ('Data Structure', 1, 90.5);
select * from grade;
delete from grade where score > 90;
select * from grade;
create table t ( id int , t_name char (3)); create table t ( id int , t_name char (3));
create table d (d_name char(5),id int); create table d (d_name char(5),id int);
......
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