sql-insert

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . Improve this question Entity Framework can be very slow on mass insert/update/delete operations. Even the often suggested tweaks to turn off AutoDetectChanges and/or ValidateOnSaveEnabled does not always help. I have come across the Z.EntityFramework.Extensions on NuGet, but it seems

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . Improve this question Entity Framework can be very slow on mass insert/update/delete operations. Even the often suggested tweaks to turn off AutoDetectChanges and/or ValidateOnSaveEnabled does not always help. I have come across the Z.EntityFramework.Extensions on NuGet, but it seems

问题 I am trying to update a table whenever a new row is inserted into another table. When a row is added to the storeRoutes table, I want this trigger to update a column in my productList table. It should set the column isAvailable to 0 (false) using the storeProductId column from the new row inserted into storeRoutes . Here is my trigger: CREATE TRIGGER [setIsAvailableFalse] ON [storeRoutes] AFTER INSERT AS BEGIN SET NOCOUNT ON; UPDATE productList SET isAvailable = 0 WHERE productId = Inserted

问题 I have a basic understanding of SQL databases and I might overlooked something, but I cannot figure out the following problem: there is a many-to-many relationship (for example: users - user_roles - roles). Is it possible to add (new) role to a (new) user with one SQL command (atomic operation)? Currently I use Sqlite. I am aware of the SELECT last_insert_rowid(); command and with this and several SQL commands I can achieve what I want. But I want to incorporate it into one command (so the

问题 I have a basic understanding of SQL databases and I might overlooked something, but I cannot figure out the following problem: there is a many-to-many relationship (for example: users - user_roles - roles). Is it possible to add (new) role to a (new) user with one SQL command (atomic operation)? Currently I use Sqlite. I am aware of the SELECT last_insert_rowid(); command and with this and several SQL commands I can achieve what I want. But I want to incorporate it into one command (so the

问题 I get this error on executing the below function & It is because NaN is tried to be inserted into numeric column. Replacing NaN with 0 throughout does work but replacement with None does not. Any ideas would be appreciated def insertData(table_name, schema_name, df): if not df.empty: #input_data[file].fillna(0, inplace=True) # This works but replacing with 0's is not ideal df.where(pd.notnull(df), None) #This does not work values = df.to_dict(orient='records') table = sa.Table(table_name ,

问题 I have the table named EPOCA with this schema: CREATE TABLE EPOCA ( ID INT CONSTRAINT PK_EPOCA PRIMARY KEY, NOME VARCHAR(250), DATE_INITIAL DATE CONSTRAINT NN_EPOCA_DATA_INI NOT NULL, DATE_END DATE, CONSTRAINT CK_EPOCA_DATAS CHECK (DATE_INITIAL < DATE_END) ); And even though I already check if the initial date is smaller then the end date, I need to check that when I insert a new EPOCA the dates I insert will not overlap with any of the present dates. I developed this trigger: CREATE OR

问题 In Access 2003-2016, I am using CurrentDb.Execute with dbFailonError to run an INSERT statement. The INSERT statement should fail (and it does) because one field has an incorrect value based on a related table with "Enforced Referential Integrity". However, it does not throw an error. I have tried recreating this issue in a new database, and the error works correctly. There is something wrong in the settings with my current database, and I don't want to recreate it from scratch. I have taken

问题 In Access 2003-2016, I am using CurrentDb.Execute with dbFailonError to run an INSERT statement. The INSERT statement should fail (and it does) because one field has an incorrect value based on a related table with "Enforced Referential Integrity". However, it does not throw an error. I have tried recreating this issue in a new database, and the error works correctly. There is something wrong in the settings with my current database, and I don't want to recreate it from scratch. I have taken

问题 I'm trying to create a JSON object and then read the values from it into MySQL table. But I'm facing errors and I'm new to both JSON and MySQL. SET @j = '{"key1": "value1", "key2": "value2"}'; CREATE TABLE Person (name int,id int); INSERT INTO Person (name,id) SELECT * FROM OPENJSON(@j) WITH (name int,id int); 回答1: On creating table set your field as JSON datatype. CREATE TABLE `person` ( `name` json DEFAULT NULL ); And Insert JSON data into it, INSERT INTO `person` (`name`) VALUES ('["name1"