Concatenate five fields where some may be NULL
I have a trench containing five types of ducts.
I have created fields the trenches: Type1, Type2, Type3, ...
The values in each field are the numbers of each type of duct that the trench contains.
eg. lets say that one trench contains 2 ducts of type one and one duct of type 2, then I would like to label it something like this: 2xType1,Type2
The other types are NULL. How can I write a compact expression to handle this?
qgis null concatenation
edited Feb 28 at 19:55
underdark♦
69.1k13178346
asked Feb 28 at 10:17
SundrawSundraw
41
add a comment |
I have a trench containing five types of ducts.
I have created fields the trenches: Type1, Type2, Type3, ...
The values in each field are the numbers of each type of duct that the trench contains.
eg. lets say that one trench contains 2 ducts of type one and one duct of type 2, then I would like to label it something like this: 2xType1,Type2
The other types are NULL. How can I write a compact expression to handle this?
qgis null concatenation
edited Feb 28 at 19:55
underdark♦
69.1k13178346
asked Feb 28 at 10:17
SundrawSundraw
41
3
What have you tried? You should be able to use the coalesce function in a label expression to hande nulls
– BERA
Feb 28 at 10:27
add a comment |
I have a trench containing five types of ducts.
I have created fields the trenches: Type1, Type2, Type3, ...
The values in each field are the numbers of each type of duct that the trench contains.
eg. lets say that one trench contains 2 ducts of type one and one duct of type 2, then I would like to label it something like this: 2xType1,Type2
The other types are NULL. How can I write a compact expression to handle this?
qgis null concatenation
edited Feb 28 at 19:55
underdark♦
69.1k13178346
asked Feb 28 at 10:17
SundrawSundraw
41
I have a trench containing five types of ducts.
I have created fields the trenches: Type1, Type2, Type3, ...
The values in each field are the numbers of each type of duct that the trench contains.
eg. lets say that one trench contains 2 ducts of type one and one duct of type 2, then I would like to label it something like this: 2xType1,Type2
The other types are NULL. How can I write a compact expression to handle this?
qgis null concatenation
qgis null concatenation
edited Feb 28 at 19:55
underdark♦
69.1k13178346
asked Feb 28 at 10:17
SundrawSundraw
41
edited Feb 28 at 19:55
underdark♦
69.1k13178346
asked Feb 28 at 10:17
SundrawSundraw
41
edited Feb 28 at 19:55
underdark♦
69.1k13178346
edited Feb 28 at 19:55
underdark♦
69.1k13178346
edited Feb 28 at 19:55
underdark♦
69.1k13178346
69.1k13178346
asked Feb 28 at 10:17
SundrawSundraw
41
asked Feb 28 at 10:17
SundrawSundraw
41
asked Feb 28 at 10:17
SundrawSundraw
41
41
3
What have you tried? You should be able to use the coalesce function in a label expression to hande nulls
– BERA
Feb 28 at 10:27
add a comment |
3
What have you tried? You should be able to use the coalesce function in a label expression to hande nulls
– BERA
Feb 28 at 10:27
3
3
What have you tried? You should be able to use the coalesce function in a label expression to hande nulls
– BERA
Feb 28 at 10:27
What have you tried? You should be able to use the coalesce function in a label expression to hande nulls
– BERA
Feb 28 at 10:27
add a comment |
1 Answer
1
active
oldest
votes
Maybe use something like the following:
replace(
if("Type 1" > 0 and "Type 2" > 0, "Type 1" || 'x Type1, ' || "Type 2" || 'x Type2',
if("Type 1" = 0 or "Type 1" IS NULL, "Type 2" || 'x Type2',
if("Type 2" = 0 or "Type 2" IS NULL, "Type 1" || 'x Type1', ''))), '1x', '')
answered Feb 28 at 11:00
JosephJoseph
58.5k7101206
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Maybe use something like the following:
replace(
if("Type 1" > 0 and "Type 2" > 0, "Type 1" || 'x Type1, ' || "Type 2" || 'x Type2',
if("Type 1" = 0 or "Type 1" IS NULL, "Type 2" || 'x Type2',
if("Type 2" = 0 or "Type 2" IS NULL, "Type 1" || 'x Type1', ''))), '1x', '')
answered Feb 28 at 11:00
JosephJoseph
58.5k7101206
add a comment |
Maybe use something like the following:
replace(
if("Type 1" > 0 and "Type 2" > 0, "Type 1" || 'x Type1, ' || "Type 2" || 'x Type2',
if("Type 1" = 0 or "Type 1" IS NULL, "Type 2" || 'x Type2',
if("Type 2" = 0 or "Type 2" IS NULL, "Type 1" || 'x Type1', ''))), '1x', '')
answered Feb 28 at 11:00
JosephJoseph
58.5k7101206
add a comment |
Maybe use something like the following:
replace(
if("Type 1" > 0 and "Type 2" > 0, "Type 1" || 'x Type1, ' || "Type 2" || 'x Type2',
if("Type 1" = 0 or "Type 1" IS NULL, "Type 2" || 'x Type2',
if("Type 2" = 0 or "Type 2" IS NULL, "Type 1" || 'x Type1', ''))), '1x', '')
answered Feb 28 at 11:00
JosephJoseph
58.5k7101206
Maybe use something like the following:
replace(
if("Type 1" > 0 and "Type 2" > 0, "Type 1" || 'x Type1, ' || "Type 2" || 'x Type2',
if("Type 1" = 0 or "Type 1" IS NULL, "Type 2" || 'x Type2',
if("Type 2" = 0 or "Type 2" IS NULL, "Type 1" || 'x Type1', ''))), '1x', '')
answered Feb 28 at 11:00
JosephJoseph
58.5k7101206
edited Feb 28 at 15:54
answered Feb 28 at 11:00
JosephJoseph
58.5k7101206
answered Feb 28 at 11:00
JosephJoseph
58.5k7101206
answered Feb 28 at 11:00
JosephJoseph
58.5k7101206
58.5k7101206
add a comment |
add a comment |
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3
What have you tried? You should be able to use the coalesce function in a label expression to hande nulls
– BERA
Feb 28 at 10:27