exists

问题 This question already has answers here : Find records from one table which don't exist in another (8 answers) Closed 10 months ago . I have two tables, table03 have 10 rows and table01 have 21 rows, now I want to get rows from table03 where they don't exist in table01, so far I wrote this query but it shows all rows of table03 even some rows doesn't exist on table01. SELECT T3.`DateAdded`, T3.`Query_name`, T3.`Fund`, T3.`Ticker` FROM `table_name03` T3 LEFT JOIN `table_name01` T1 ON T3.

问题 Made a simple batch script to create a .sfv for each file within the folder. I'm far from being a coder but I patched this together from various sites and made it work: for %%f in (*) do (cfv -C -f"%%f".sfv -tsfv "%%f") The issue is, if I run this batch file more than once, existing files get checked again and a separate .sfv file is created as a *.sfv.sfv Just wondering, how can this be written to ignore checking a file/writing a new .sfv if a .sfv exists? Thank you! Edit: I tried the

问题 I would like to find documents that contain some fields, by using $exists . In particular, I am interested in two fields: payload.fields.MDI_CC_DIAG_DTC_LIST and payload.asset . If I want to find only documents that contain the first one, this is my query: db.getCollection("dtc").find({"payload.fields.MDI_CC_DIAG_DTC_LIST": {$exists: true}}).count() It gives me 2265 documents. When I try to find documents that contain two fields (the ones described above), I use this code: db.getCollection(

问题 let's say that there're 2 tables (in oracle SQL) like this: user(user_id, company_id): 123 | company_id_1 | 123 | company_id_2 | company(id, version_id): company_id_1 | (null) | company_id_2 | version_id1 | the following query returns 2 rows company_id_1 company_id_2 SELECT distinct(company_id) FROM user WHERE user.user_id = 123 AND user.company_id IS NOT NULL AND EXISTS (SELECT 1 FROM company INNER JOIN user ON company.id = user.company_id AND company.version_id IS NOT NULL); I would expect

问题 let's say that there're 2 tables (in oracle SQL) like this: user(user_id, company_id): 123 | company_id_1 | 123 | company_id_2 | company(id, version_id): company_id_1 | (null) | company_id_2 | version_id1 | the following query returns 2 rows company_id_1 company_id_2 SELECT distinct(company_id) FROM user WHERE user.user_id = 123 AND user.company_id IS NOT NULL AND EXISTS (SELECT 1 FROM company INNER JOIN user ON company.id = user.company_id AND company.version_id IS NOT NULL); I would expect

问题 We're using EFCore 3.1 and trying to build a query using Exists by means of .Any() which spans 2 properties. var selectionCriteria = someHugeList.Select(sh => new { sh.Id, sh.StatusCode }).ToList() var resultsQry = _myContext.SomeClass .Include(sc => sc.DetailRecords) .Where(sc => selectionCriteria.Any(crit => crit.Id == sc.Id && crit.StatusCode == sc.StatusCode)); var results = await resultsQry.ToListAsync() When running this query (even with a small amount (5 items) of selection criteria

问题 We're using EFCore 3.1 and trying to build a query using Exists by means of .Any() which spans 2 properties. var selectionCriteria = someHugeList.Select(sh => new { sh.Id, sh.StatusCode }).ToList() var resultsQry = _myContext.SomeClass .Include(sc => sc.DetailRecords) .Where(sc => selectionCriteria.Any(crit => crit.Id == sc.Id && crit.StatusCode == sc.StatusCode)); var results = await resultsQry.ToListAsync() When running this query (even with a small amount (5 items) of selection criteria

问题 We're using EFCore 3.1 and trying to build a query using Exists by means of .Any() which spans 2 properties. var selectionCriteria = someHugeList.Select(sh => new { sh.Id, sh.StatusCode }).ToList() var resultsQry = _myContext.SomeClass .Include(sc => sc.DetailRecords) .Where(sc => selectionCriteria.Any(crit => crit.Id == sc.Id && crit.StatusCode == sc.StatusCode)); var results = await resultsQry.ToListAsync() When running this query (even with a small amount (5 items) of selection criteria

问题 I have a custom build command that needs to check if a certain file exists. I tried using IF(EXISTS "/the/file") ... ELSE() ... ENDIF() but that test is only evaluated one; when cmake is first run. I need it to perform the test every time a make is done. What's the method to check at make-time? Thanks. 回答1: You can use add_custom_command to invoke CMake itself in script mode by using the -P command line option. So your command would be something like: set(FileToCheck "/the/file") add_custom

问题 I have a custom build command that needs to check if a certain file exists. I tried using IF(EXISTS "/the/file") ... ELSE() ... ENDIF() but that test is only evaluated one; when cmake is first run. I need it to perform the test every time a make is done. What's the method to check at make-time? Thanks. 回答1: You can use add_custom_command to invoke CMake itself in script mode by using the -P command line option. So your command would be something like: set(FileToCheck "/the/file") add_custom