sqldf 包中的未知错误

Question

这个错误是什么意思？

Closing open result set, pending rowsError in result_create(conn@ptr, statement) : near "(": syntax error

当我想要运行代码

时出现

    ```{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")
    ```

同时在

中给出上述错误

dbSendQuery(conn =  first,
            "CREATE TABLE INCOME
            ( 
CompName TEXT,
In(2016) INTEGER,
In(2017) INTEGER,
In(2018) INTEGER,
FOREIGN KEY(CompName)
            )")

代码区域。这个错误是什么意思？它是一些特定的格式错误吗？或者我错过了一些在执行之前必须提到的块。或者是否涉及其他包请帮助。

Answer 1

根据@SatZ 和你给出四列并输入三个值的错误，你的理想代码应该是

```{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

dbSendQuery()方法return是一个"DBIResult"对象，调用者有责任用dbClearResult()清除它。对于没有 return 结果集的查询，请使用 dbExecute() 而不是 dbSendQuery() 以避免警告。（对于没有 return 结果集的查询，dbExecute() 相当于 dbGetQuery()。）

请参阅 dbBind() 的帮助，了解较长形式的用例 dbSendQuery() + dbFetch() + dbClearResult().

sqldf 包中的未知错误

Unknown error in sqldf package

r

sqldf

rsqlite