最近使用NodeJS的mssql模块连接SQLServer数据库出现了"Incorrect syntax near the keyword ‘user’."的错误,Google了一下发现原来我在SQLServer中使用了user作为表明,但是SQLServer中user是保留的关键字,不能被用于做表名或者变量名。所以解决方案很简单,直接重命名表名user为t_user或者其他的名称就OK了。 在SQLServe...
Syntax error in DROP INDEX statement. (Error 3294)Article 06/14/2014 Expand table You entered an SQL statement that has an invalid DROP INDEX statement. Possible causes: A reserved word or argument name is misspelled or missing. Punctuation is incorrect....
The DROP COLUMN form does not physically remove the column, but simply makes it invisible to SQL operations. Subsequent insert and update operations in the table will store a NULL value for the column. Therefore, column deletion takes a short period of time but does not immediately release the...
Let us create an index for the column named 'NAME' in the existing CUSTOMERS table using the following query −CREATE INDEX sample_index on CUSTOMERS(NAME); SQL DROP INDEX Statement The DROP INDEX statement is used to drop an index from a table. Following is the syntax −...
Now, we shortly describe the main differences between TRUNCATE, DELETE, and DROP in the table. Note:You should be careful with theTRUNCATE TABLEstatement. This command can delete all data permanently. Luckily,dbForge SQL Complete, which is one of the best SQL database development, management, ...
Syntax error in DROP TABLE or DROP INDEX. (Error 3295)Article 06/14/2014 Expand table You entered an SQL statement that has an invalid DROP statement. Possible causes: A reserved word or argument name is misspelled or missing. Punctuation is incorrect....
Avoid SQL statements that cannot be pushed down (indicated by REMOTE_XXX_QUERY in the EXPLAIN output). Refrain from frequent COUNT queries on large row-store tables (over 10 million rows). Limit the number of UNION/UNION ALL branches in a single SQL statement to 50, and associate no more...
当在修改表时仍可读【会报异常,在修改中也会阻止读ALTER TABLEblocks reads (not just writes) at the point where it is ready to install a new version of the table.frmfile, discard the old file, and clear outdated table structures from the table and table definition caches. At this point, ...
First, Drag and drop your SQL file or copy / paste your request directly into the editor above. Finally, you must click on "Check SQL syntax" button to display if there is an syntax error in your code.You can click on "Format SQL query" to make your query more readable. This simplif...
UPDATE - updates data in a database DELETE - deletes data from a database INSERT INTO - inserts new data into a database CREATE DATABASE - creates a new database ALTER DATABASE - modifies a database CREATE TABLE - creates a new table ALTER TABLE - modifies a table DROP TABLE - delet...