sql-delete

I would like to make an app where the user clicks a button, and the SQLite database is cleared. Here's what I've tried so far: db.delete(TABLE_NAME, null, null); What am I doing wrong? Your delete() call is correct. Did you get writable database? Here is example of method using delete: /** * Remove all users and groups from database. */ public void removeAll() { // db.delete(String tableName, String whereClause, String[] whereArgs); // If whereClause is null, it will delete all rows. SQLiteDatabase db = helper.getWritableDatabase(); // helper is object extends SQLiteOpenHelper db.delete

I want to do something like this: DELETE FROM table WHERE id IN (SELECT ....) How can I do that? If you have to select the id: DELETE FROM table WHERE id IN (SELECT id FROM somewhere_else) If you already know them (and they are not in the thousands): DELETE FROM table WHERE id IN (?,?,?,?,?,?,?,?) rahulnikhare Delete from BA_CITY_MASTER where CITY_NAME in (select CITY_NAME from BA_CITY_MASTER group by CITY_NAME having count(CITY_NAME)>1); Disclaim: the following suggestion could be an overhead depending on the situation. The function is only tested with MSSQL 2008 R2 but seams be compatible to

Is it possible to create/delete different databases in the graph database Neo4j like in MySQL? Or, at least, how to delete all nodes and relationships of an existing graph to get a clean setup for tests, e.g., using shell commands similar to rmrel or rm ? Peter Neubauer You can just remove the entire graph directory with rm -rf , because Neo4j is not storing anything outside that: rm -rf data/* Also, you can of course iterate through all nodes and delete their relationships and the nodes themselves, but that might be too costly just for testing ... even more simple command to delete all nodes

I am working on a project in which I have a SQLite database with a table called Table1 and values title/location without an ID as column etc... My form has a combobox which I've managed to get it display my DB each entry in one row . Now I want with a button "Delete" to delete the row that I have selected in the combobox and I am kind of lost. Here is my code for the combobox (I think it's fine): private void FillCombo(){ try { String newLine = System.getProperty("line.separator"); Class.forName("org.sqlite.JDBC"); connection = DriverManager.getConnection("jdbc:sqlite:C:\\users\\Kajou\

I have an entityrelation like this: In the ParentObj class: @OneToMany(mappedBy = "parentObj", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true) private List<ChildObj> list; In the ChildObj class: @JoinColumn(name="PARENT_OBJ") @ManyToOne private ParentObj parentObj; When the parent object persisted or removed, the child is persisted/removed as well. BUT when I try to remove all the entities with a CriteriaDelete like: CriteriaDelete<ParentObj> query = builder.createCriteriaDelete(ParentObj.class); query.from(ParentObj.class); em.createQuery(query).executeUpdate(); or a

For some reason I can't find the exact answer that I need. I searched for at last 20 minutes in here. I know it's simple. VERY simple. But I can't fire the trigger for some reason.. I have a table with two columns dbo.HashTags |__Id_|_name_| | 1 | Love | I want to insert the deleted values into another table called dbo.HashTagsArchive on a DELETE query. Example: DELETE FROM [dbo].[HashTags] WHERE Id=1 After this example I should have the deleted row in dbo.HashTagsArchive and the row with Id=1 should be deleted in dbo.HashTags I tried this TRIGGER: ALTER TRIGGER [dbo].[HashTags_BeforeDelete]

I have a SQLite DB where the statement: SELECT messdatum, count(*) as anzahl from lipo GROUP BY Messdatum ORDER BY anzahl desc; results in some lines, which indicates that I have some duplicates with the same Messdatum . How can I delete the duplicates only form my sqlite db? (it should delete anzahl-1 records where the messdatum is the same?) Has anyone an advice? PS: I found this link How to remove duplicate from Microsoft but have problems with sqlite dialect. I got some errors due to the sqlite syntax. So f.e. I could do: INSERT into holdkey SELECT messdatum, count(*) as anzahl from lipo

I made a mistake and I have unwanted duplicates. I have a table with 4 key fields. A1 , k1 , k2 , k3 . A1 is auto increment and the primary key. the combination of k1 , k2 and k3 is supposed to be unique and I have to delete the duplicate rows before I create a unique index. Some rows have one duplicate, some have many. SELECT CONCAT(k1, k2, k) AS dup_value FROM myviews GROUP BY dup_value HAVING (COUNT(dup_value) > 1) shows me duplicates values that I need to deal with. But now I don't know how to keep one and delete the rest of each duplicate set. Backup your data, then... MySQL supports

Anyone know of any plans to add support for delete parts of data from a table in Google Bigquery? The issue we have right now is we are using it for analytics of data points we collect over time. We want to run the queries over the last X days of data, however after the last X days of data we no longer need to store the data in BigQuery. The only way currently we can think of to delete the data would be to delete the entire table of data, then recreate it and load it with X number of days of data. This would though require us to store our data in daily CSV files too, which isn't optimal. Any