Unknown error in sqldf package - r

Question

What does this error mean?
Closing open result set, pending rowsError in result_create(conn#ptr, statement) : near "(": syntax error
This appears when i want to run the code
```{r}
library(sqldf)
first <- dbConnect(SQLite(), dbname= "DATA.sqlite")
dbSendQuery(conn = first,
"CREATE TABLE COMPANY_MASTER
(
CompId INTEGER,
CompName TEXT,
Address TEXT,
DirectorName TEXT,
EmployeeNo INTEGER,
PRIMARY KEY(CompName)
)")
dbSendQuery(conn = first, "INSERT INTO COMPANY_MASTER
VALUES(1001,'Infosys','ABC1927','Dr.Sandeep',128)")
dbSendQuery(conn = first, "INSERT INTO COMPANY_MASTER
VALUES(1002,'Cognizant','ERT654','Michael',156)")
dbSendQuery(conn = first, "INSERT INTO COMPANY_MASTER
VALUES(1003,'Tata','PCD531','Sancheti',113)")
*
dbSendQuery(conn = first,
"CREATE TABLE INCOME
(
CompName TEXT,
In(2016) INTEGER,
In(2017) INTEGER,
In(2018) INTEGER,
FOREIGN KEY(CompName)
*
)")
dbSendQuery(conn = first, "INSERT INTO INCOME
VALUES('518361','528464','538646')")
dbSendQuery(conn = first, "INSERT INTO INCOME
VALUES('218434','205314','225815')")
dbSendQuery(conn = first, "INSERT INTO INCOME
VALUES('1038434','1184344','128434')")
CompMAst <- dbGetQuery(conn = first, "SELECT * FROM COMPANY_MASTER")
Income <- dbGetQuery(conn = first, "SELECT * FROM INCOME")
```
While giving the above error in the
dbSendQuery(conn = first,
"CREATE TABLE INCOME
(
CompName TEXT,
In(2016) INTEGER,
In(2017) INTEGER,
In(2018) INTEGER,
FOREIGN KEY(CompName)
)")
region of the code. What does this error mean? Is it some specific format error? Or have i missed some chunk that had to be mentioned before executing. Or is some other package involved Please help.

Answer 1

According to #SatZ and the error of you giving four columns and entering three values your ideal code should be
```{r}
library(sqldf)
first <- dbConnect(SQLite(), dbname= "DATA.sqlite")
dbSendQuery(conn = first,
"CREATE TABLE COMPANY_MASTER
(
CompId INTEGER,
CompName TEXT,
Address TEXT,
DirectorName TEXT,
EmployeeNo INTEGER,
PRIMARY KEY(CompName)
)")
dbSendQuery(conn = first, "INSERT INTO COMPANY_MASTER
VALUES(1001,'Infosys','ABC1927','Dr.Sandeep',128)")
dbSendQuery(conn = first, "INSERT INTO COMPANY_MASTER
VALUES(1002,'Cognizant','ERT654','Michael',156)")
dbSendQuery(conn = first, "INSERT INTO COMPANY_MASTER
VALUES(1003,'Tata','PCD531','Sancheti',113)")
dbSendQuery(conn = first,
"CREATE TABLE INCOME
(
CompName TEXT,
IN_2016 TEXT,
IN_2017 TEXT,
IN_2018 TEXT)")
dbSendQuery(conn = first, "INSERT INTO INCOME
VALUES('Infosys','5183.61','5284.64','5386.46')")
dbSendQuery(conn = first, "INSERT INTO INCOME
VALUES('Cognizant','2184.34','2053.14','2258.15')")
dbSendQuery(conn = first, "INSERT INTO INCOME
VALUES('Tata','10384.34','11843.44','1284.34')")
CompMAst <- dbGetQuery(conn = first, "SELECT * FROM COMPANY_MASTER")
Income <- dbGetQuery(conn = first, "SELECT * FROM INCOME")
```

Answer 2

The dbSendQuery() method returns a "DBIResult" object, it's the caller's responsibility to clear it with dbClearResult(). For queries that don't return a result set, use dbExecute() instead of dbSendQuery() to avoid the warning. (dbExecute() is the equivalent of dbGetQuery() for queries that don't return a result set.)
See the help to dbBind() for use cases of the longer form dbSendQuery() + dbFetch() + dbClearResult().