ms-access

问题 I have a query with 4 calculated fields , one of them calculate the running sum using DSum When running this query and go to the last record it is taking some time (that is normal and OK) But the problem is that MS Access recalculate this field every time I scroll up or down using mouse wheel, and this recalculation taking a very long time that make this query unusable I think MS Access do this recalculation because it is multi user application so I change it to Exclusive (File > Options >

问题 I have a query with 4 calculated fields , one of them calculate the running sum using DSum When running this query and go to the last record it is taking some time (that is normal and OK) But the problem is that MS Access recalculate this field every time I scroll up or down using mouse wheel, and this recalculation taking a very long time that make this query unusable I think MS Access do this recalculation because it is multi user application so I change it to Exclusive (File > Options >

问题 I have a table named Employees with a field named EmployeeID. In a separate table, I have a separate master table of employees named Master with a field named EmployeeStatus. I am trying to validate all employees who have been terminated from the company are not listed in the Employees table. However, current code I am using below is returning duplicate of the first record in the master table of employees. The value of record count property of the recordset object matches what I expect, the

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Need help for my SQL query Well I may have posted this earlier also, but my requirements changed a bit, so please help me on this one. My database structure: ATT ( Activity table) Act_ID(PK) Assigned_To_ID (FK, refer to Emp_ID ) Project_ID (FK, refer to Project_ID ) Product_ID (FK, refer to Product_ID ) Status (can be New, OnHold, Cancel, Closed ) Product_Table Product_ID (PK) Product_Name Project_Table Project

问题 I'm having an issue with a VBA function for my query in Access. I have a table " tbldata " Equipment Last Inspection 420-413 2019-06-15 440-433 2019-06-15 402-483 2019-06-29 420-413 2019-12-12 and a query " qryunpair " UnpairEquipment 420 413 440 433 402 483 What I'm trying to achieve is: Equipment Latest Date 420 2019-12-12 413 2019-12-12 440 2019-06-15 433 2019-06-15 402 2019-06-29 483 2019-06-29 I've made the following code, but when I ran it, it didn't return any values. Is there a

问题 To better explain what I need please look at this table: ID --- image A1 --- a1_01.jpg A1 --- a1_02.jpg B7 --- b7_01.jpg B7 --- b7_02.jpg D3 --- D3_04.jpg D3 --- D3_99.jpg ... (From A to Z) Z9 --- Z9_12.jpg Z9 --- Z9_13.jpg Z9 --- Z9_20.jpg Z9 --- Z9_99.jpg ...and so on I need the results to be: ID --- Image A1 --- a1_01.jpg B7 --- b7_01.jpg D3 --- D3_04.jpg ... Z9 --- Z9_12.jpg ...and so on In MS-Access this is can be done with SELECT ID, First(image) AS 'Image' FROM Photos How can I

问题 I use MS Access (2003) database. Once I create a column I set NOT NULL using sql statement: ALTER TABLE Table1 ALTER column myColumn INTEGER not null Is there a way to change it back to allow null values? I already tried: ALTER TABLE Table1 ALTER column myColumn INTEGER null but nothing... 回答1: You cant specify null in ALTER TABLE (although not null is allowed) See the below documentation and also this discussion on this toppic Syntax ALTER TABLE table {ADD {COLUMN field type[(size)] [NOT

问题 I am using the DateDiff function, but I would like for it to give me 3 decimal places. How should my query be altered to achieve such result? -- I need this done via the query itself not a VBA function. Date123: DateDiff('d', [startdate], [enddate]) 回答1: For a line that you can just put into a query, I'd use something like the following. Format(DateDiff("s",[DateOne],[DateTwo])/60/60/24,"#.###") Better practice would be to create a function in a module in your db like the following. Then call

问题 I am using the DateDiff function, but I would like for it to give me 3 decimal places. How should my query be altered to achieve such result? -- I need this done via the query itself not a VBA function. Date123: DateDiff('d', [startdate], [enddate]) 回答1: For a line that you can just put into a query, I'd use something like the following. Format(DateDiff("s",[DateOne],[DateTwo])/60/60/24,"#.###") Better practice would be to create a function in a module in your db like the following. Then call

问题 I am using the DateDiff function, but I would like for it to give me 3 decimal places. How should my query be altered to achieve such result? -- I need this done via the query itself not a VBA function. Date123: DateDiff('d', [startdate], [enddate]) 回答1: For a line that you can just put into a query, I'd use something like the following. Format(DateDiff("s",[DateOne],[DateTwo])/60/60/24,"#.###") Better practice would be to create a function in a module in your db like the following. Then call