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Parse By Delimitor with sqldf
Unable to use rank() over functions in R using sqldfError in rsqlite_send_querySyntax error in R SQLDF, “Error in rsqlite_send_query”sqldf gives error while using subqueryUpdating a table With a DataframeUpdating one df based on data in another dfr combine two dataframes not the same and with timestampsUpdate column values with sql in rHow to include a user defined variable in sqldf query?SQLite in R - error in result_create(conn@ptr, statement) : near “)”
I have a dataframe like below:
df
ColA ColB
New|ME 7
New|You 8
ten 9
Aim|High 10
Expected Output:
ColA ColB First Second
New|ME 7 New ME
New|You 8 New You
ten 9 ten NA
Aim|High 10 Aim High
How do I parse ColA using sqldf by the delimitor |?
This was my attempt but I received an error:
library(sqldf)
df1<- sqldf("SELECT * FROM df CROSS APPLY STRING_SPLIT([ColA], '|') ")
Error in result_create(conn@ptr, statement) : near "(": syntax error
r sqldf
asked Mar 7 at 22:56
nak5120nak5120
1,5451230
add a comment |
I have a dataframe like below:
df
ColA ColB
New|ME 7
New|You 8
ten 9
Aim|High 10
Expected Output:
ColA ColB First Second
New|ME 7 New ME
New|You 8 New You
ten 9 ten NA
Aim|High 10 Aim High
How do I parse ColA using sqldf by the delimitor |?
This was my attempt but I received an error:
library(sqldf)
df1<- sqldf("SELECT * FROM df CROSS APPLY STRING_SPLIT([ColA], '|') ")
Error in result_create(conn@ptr, statement) : near "(": syntax error
r sqldf
asked Mar 7 at 22:56
nak5120nak5120
1,5451230
Google sqlite functions to find out what functions SQLite provides. Also RSQLite provides the functions listed inlibrary(RSQLite); help("initExtension")In this case you should be able to do it usinginstrandsubstr.
– G. Grothendieck
Mar 7 at 23:04
thank you, that helped get my answer
– nak5120
Mar 7 at 23:11
add a comment |
I have a dataframe like below:
df
ColA ColB
New|ME 7
New|You 8
ten 9
Aim|High 10
Expected Output:
ColA ColB First Second
New|ME 7 New ME
New|You 8 New You
ten 9 ten NA
Aim|High 10 Aim High
How do I parse ColA using sqldf by the delimitor |?
This was my attempt but I received an error:
library(sqldf)
df1<- sqldf("SELECT * FROM df CROSS APPLY STRING_SPLIT([ColA], '|') ")
Error in result_create(conn@ptr, statement) : near "(": syntax error
r sqldf
asked Mar 7 at 22:56
nak5120nak5120
1,5451230
I have a dataframe like below:
df
ColA ColB
New|ME 7
New|You 8
ten 9
Aim|High 10
Expected Output:
ColA ColB First Second
New|ME 7 New ME
New|You 8 New You
ten 9 ten NA
Aim|High 10 Aim High
How do I parse ColA using sqldf by the delimitor |?
This was my attempt but I received an error:
library(sqldf)
df1<- sqldf("SELECT * FROM df CROSS APPLY STRING_SPLIT([ColA], '|') ")
Error in result_create(conn@ptr, statement) : near "(": syntax error
r sqldf
r sqldf
asked Mar 7 at 22:56
nak5120nak5120
1,5451230
asked Mar 7 at 22:56
nak5120nak5120
1,5451230
asked Mar 7 at 22:56
nak5120nak5120
1,5451230
asked Mar 7 at 22:56
nak5120nak5120
1,5451230
asked Mar 7 at 22:56
nak5120nak5120
1,5451230
1,5451230
Google sqlite functions to find out what functions SQLite provides. Also RSQLite provides the functions listed inlibrary(RSQLite); help("initExtension")In this case you should be able to do it usinginstrandsubstr.
– G. Grothendieck
Mar 7 at 23:04
thank you, that helped get my answer
– nak5120
Mar 7 at 23:11
add a comment |
Google sqlite functions to find out what functions SQLite provides. Also RSQLite provides the functions listed inlibrary(RSQLite); help("initExtension")In this case you should be able to do it usinginstrandsubstr.
– G. Grothendieck
Mar 7 at 23:04
thank you, that helped get my answer
– nak5120
Mar 7 at 23:11
Google sqlite functions to find out what functions SQLite provides. Also RSQLite provides the functions listed in
library(RSQLite); help("initExtension") In this case you should be able to do it using instr and substr.– G. Grothendieck
Mar 7 at 23:04
Google sqlite functions to find out what functions SQLite provides. Also RSQLite provides the functions listed in
library(RSQLite); help("initExtension") In this case you should be able to do it using instr and substr.– G. Grothendieck
Mar 7 at 23:04
thank you, that helped get my answer
– nak5120
Mar 7 at 23:11
thank you, that helped get my answer
– nak5120
Mar 7 at 23:11
add a comment |
1 Answer
1
active
oldest
votes
df <- sqldf("SELECT *, SUBSTR([ColA], 1, INSTR([ColA],'|')-1) First FROM df")
df <- sqldf("SELECT *, SUBSTR([ColA], INSTR([ColA],'|')+1, Length([ColA])) Second FROM df")
df <- sqldf("SELECT ColA, ColB, First, Second FROM df")
answered Mar 7 at 23:22
nak5120nak5120
1,5451230
Suggest combining these all into oneselectstatement. Also note that you can omit the 3rd argument insubstrif you want everything remaining.
– G. Grothendieck
Mar 8 at 1:00
add a comment |
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df <- sqldf("SELECT *, SUBSTR([ColA], 1, INSTR([ColA],'|')-1) First FROM df")
df <- sqldf("SELECT *, SUBSTR([ColA], INSTR([ColA],'|')+1, Length([ColA])) Second FROM df")
df <- sqldf("SELECT ColA, ColB, First, Second FROM df")
answered Mar 7 at 23:22
nak5120nak5120
1,5451230
Suggest combining these all into oneselectstatement. Also note that you can omit the 3rd argument insubstrif you want everything remaining.
– G. Grothendieck
Mar 8 at 1:00
add a comment |
df <- sqldf("SELECT *, SUBSTR([ColA], 1, INSTR([ColA],'|')-1) First FROM df")
df <- sqldf("SELECT *, SUBSTR([ColA], INSTR([ColA],'|')+1, Length([ColA])) Second FROM df")
df <- sqldf("SELECT ColA, ColB, First, Second FROM df")
answered Mar 7 at 23:22
nak5120nak5120
1,5451230
Suggest combining these all into oneselectstatement. Also note that you can omit the 3rd argument insubstrif you want everything remaining.
– G. Grothendieck
Mar 8 at 1:00
add a comment |
df <- sqldf("SELECT *, SUBSTR([ColA], 1, INSTR([ColA],'|')-1) First FROM df")
df <- sqldf("SELECT *, SUBSTR([ColA], INSTR([ColA],'|')+1, Length([ColA])) Second FROM df")
df <- sqldf("SELECT ColA, ColB, First, Second FROM df")
answered Mar 7 at 23:22
nak5120nak5120
1,5451230
df <- sqldf("SELECT *, SUBSTR([ColA], 1, INSTR([ColA],'|')-1) First FROM df")
df <- sqldf("SELECT *, SUBSTR([ColA], INSTR([ColA],'|')+1, Length([ColA])) Second FROM df")
df <- sqldf("SELECT ColA, ColB, First, Second FROM df")
answered Mar 7 at 23:22
nak5120nak5120
1,5451230
answered Mar 7 at 23:22
nak5120nak5120
1,5451230
answered Mar 7 at 23:22
nak5120nak5120
1,5451230
answered Mar 7 at 23:22
nak5120nak5120
1,5451230
1,5451230
Suggest combining these all into oneselectstatement. Also note that you can omit the 3rd argument insubstrif you want everything remaining.
– G. Grothendieck
Mar 8 at 1:00
add a comment |
Suggest combining these all into oneselectstatement. Also note that you can omit the 3rd argument insubstrif you want everything remaining.
– G. Grothendieck
Mar 8 at 1:00
Suggest combining these all into one
select statement. Also note that you can omit the 3rd argument in substr if you want everything remaining.– G. Grothendieck
Mar 8 at 1:00
Suggest combining these all into one
select statement. Also note that you can omit the 3rd argument in substr if you want everything remaining.– G. Grothendieck
Mar 8 at 1:00
add a comment |
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Google sqlite functions to find out what functions SQLite provides. Also RSQLite provides the functions listed in
library(RSQLite); help("initExtension")In this case you should be able to do it usinginstrandsubstr.– G. Grothendieck
Mar 7 at 23:04
thank you, that helped get my answer
– nak5120
Mar 7 at 23:11