Our free cool tool for managing SQLite databases has been released in v. 1.80.
This includes a new local SQL filter capability in addition to being compiled with latest version of kbmMW and kbmMemTable.
To download it, login at https://portal.components4developers.com and it is readily available for you to download.
If you do not have a login already, you can easily and for free sign up same place.
The existing filtering capability
kbmSQLiteMan has for a long time had the ability to locally add an additional filter on result sets returned from the SQLite database.
In this filter are, a fairly complex expression can be type, ranging from simple SIZE<10 which filters the result set to only show the 3 records with a SIZE value less than 10. AND, OR, NOT, (), LIKE “P*” etc. are all supported.
The new local SQL “filtering” capability
The above filtering is fine for simply ensuring some records in the result set are not displayed. However if you want to do something more complex with the result set, like complex filtering, grouping, calculations or custom ordering etc, you may want to use the new SQL filtering capability. It internally use kbmMemTable’s SQL ability which is fairly close to regular SQL.
Here we combine the result set’s NAME and SIZE column to one column called NAMESIZE. This simple example could of course just as well have been handled in the original SQLite SQL statement, but there may be situations where you want to keep the original data, but do something more with it.
kbmMemTable SQL supports SELECT statements with optional sub select, CASE/WHEN/ELSE, IN, BETWEEN, LIKE, MOD, DIV, ORDER BY, GROUP BY, HAVING, LIMIT, OFFSET, || (concat), +, -, *, / in addition to a good number of functions:
SIN(x), COS(x), TAN(x), LOG(x), LOG2(x), EXP(x), TRUNC(x), FRAC(x), MOD(x), DIV(x), SQRT(x), SQR(x), ROOT(x,y), MIN(x,…), MAX(x,…), AVG(x,…), SUM(x,…), ABS(x), POW(x,y)
UPPER(x), LOWER(x), TRIM(x), TRIMLEFT(x), TRIMRIGHT(x), MID(x,p,n), LEFT(x,n), RIGHT(x,n), LENGTH(x), LEFTPAD(x,c,n), RIGHTPAD(x,c,n), CHR(x), POS(sx,x), REPLACE(x,so,sr [,o1][,o2]), SPLIT(x,sx, OUT v), REGEXP(re,x [,OUT v]),
NOW, DATE(x), TIME(x), YEAR(x), MONTH(x), DAY(x), HOURS(x), MINUTES(x), SECONDS(x), DATESTRING(x), TIMESTRING(x)
CASTTODATETIME(x), CASTTOSTRING(x), CASTTONUMBER(x), CASTTOFLOAT(x), CASTTOINT(x)
IF(x,te,fe [,ne]), NULLIF(x1,x2), ISNULL(x), COALESCE(x,…)
x and y = A value (constant, out defined variable, expression or a field). Values are auto converted between numbers and strings as needed p = An offset. 1 is first character n = A number indicating a count c = A character sx = A sub string value so = String to search for sr = String to replace with o1 = True/false value. If true, replaces all occurrences o2 = True/false value. If true, ignores case v = Name of a variable. The name must start with $. $VAR1 is a valid name re = Regular expression te = True expression. Returned if x evaluates to true fe = False expression. Returned if x evaluates to false ne = NULL expression. Returned if x evaluates to NULL x1 = A value. If x1=x2, NULL is returned, else x1. x2 = A value fn = A fieldname as a string, to return the value from
The FROM clause must always refer to the virtual table named DATA which represents the complete original result set.
Examples of valid SQL filter statements
SELECT fld5,MAX(fld1),MAX(fld2) FROM DATA GROUP BY fld5 SELECT DISTINCT * FROM DATA SELECT FieldValue('fld1') as myfld1,Coalesce(FieldValue('NoField'),"ISNULL") as NoField FROM DATA SELECT Coalesce(10) FROM DATA SELECT Coalesce(Null) FROM DATA SELECT Coalesce(fld7,99999) FROM DATA SELECT Coalesce(fld7,Null,99999) FROM DATA SELECT fld1, (SELECT Max(fld1) FROM DATA) FROM DATA SELECT fld1 FROM DATA WHERE fld3 IN (SELECT b.fld2 FROM DATA b WHERE b.fld2<4) SELECT 1, MAX(fld1) FROM DATA GROUP BY 1 SELECT 1 AS 'ID', MAX(fld1) FROM DATA GROUP BY ID SELECT NULL as fld1, fld2, "ABC" as fld3, 10+20 as fld4 FROM DATA SELECT RegExp("1\d",fld2), fld2 FROM DATA SELECT RegExp("^(\d)(\d*)",fld2,OUT $PAR),$PAR,fld2 FROM DATA SELECT fld1 AS TIME, fld2 FROM DATA WHERE fld1 LIKE "STR1%" SELECT fld1, fld2 FROM DATA WHERE fld1 LIKE "STR1%" SELECT fld1, fld2 FROM DATA WHERE NOT fld1 LIKE "STR1%" SELECT fld1, fld2 FROM DATA WHERE fld1 NOT LIKE "STR1%" SELECT fld1, fld2 FROM DATA WHERE fld2 LIKE "8%" SELECT fld1, fld2, CASE WHEN fld2<100 THEN 'LOW' WHEN fld2>=100 AND fld2<200 THEN 'MEDIUM' ELSE 'HIGH' END FROM DATA SELECT fld1, fld2, CASE fld2 WHEN 10 THEN 99999 WHEN 20 THEN 22222 ELSE -1 END FROM DATA SELECT RecNo,RowID,* FROM DATA SELECT fld1 FROM DATA WHERE fld2 in (10,20,30) SELECT 1-2-3 FROM DATA LIMIT 1 SELECT LeftPad(fld3,'A',10),RightPad(fld3,'B',12),fld3||'ABC' FROM DATA SELECT fld2+1 as fld2a FROM DATA ORDER BY fld2a DESC SELECT fld2+1 as fld2 FROM DATA SELECT fld1,fld2,fld3,fld6,fld3 AS SomeField1,fld2 AS SomeField2,fld5 FROM DATA WHERE fld5 IN (5) ORDER BY fld6,SomeField2 SELECT fld2 as Field2, fld3, sum(fld5) as fld5, Sum(fld2) as SomeField1, Sum(fld3) as SomeField2 FROM DATA GROUP BY Field2, fld3 SELECT fld2 as Field2, fld3, sum(fld5) as SomeField1, Sum(fld2) as SomeField2, Sum(fld3) as SomeField3 FROM DATA GROUP BY Field2, fld3 SELECT fld5,sum(fld5) as sumoffld5,count(fld5) as countoffld5 FROM DATA GROUP BY fld5 HAVING count(fld5)>2 SELECT fld2 as somefield, fld3 FROM DATA SELECT fld5 as somefield,sum(fld5),count(fld5) FROM DATA GROUP BY somefield HAVING count(fld5)>2 SELECT count(*)+5 FROM DATA SELECT * FROM DATA LIMIT 10 OFFSET 50 SELECT * FROM DATA LIMIT 10 SELECT * FROM DATA OFFSET 50 SELECT fld2, IF(fld2>10,True,False) AS IsSomething FROM DATA SELECT SUM(fld5),SUM(fld6),SUM(fld5)+Sum(fld6) AS TotalField FROM DATA SELECT count(distinct Left(fld1,4)) from DATA SELECT length(fld1) from DATA SELECT fld5,sum(if(fld5>5,1,0)),count(fld5) from DATA group by fld5 SELECT fld1,Min(20,30,10,40),Max(20,30,10,40),Avg(20,30,10,40),Sum(20,30,10,40) FROM DATA SELECT fld2 FROM DATA where fld2 xor (fld2 mod 10) SELECT if(1 xor 1,0,1),fld2 FROM DATA SELECT if(0 xor 1,0,1),fld2 FROM DATA SELECT if(10 IN (10,20,30),1,0),fld2 FROM DATA SELECT if(11 IN (10,20,30),1,0),fld2 FROM DATA SELECT MAX((SELECT max(b.fld1) FROM DATA b WHERE a.fld2=b.fld2)) FROM DATA a
Happy filtering with the new kbmSQLiteMan release!
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