IN the SQL database system, the CONCAT is replaced by ‘||’, which is the string concatenation symbol. The concatenation symbol is suitable with any SQL standards but this will not work perfectly in all database systems. For example, you need to make use of the operator “+” in the ...
Nested tables defined in PL/SQL have many more operations than previously. You can compare nested tables for equality, test whether an element is a member of a nested table, test whether one nested table is a subset of another, perform set operations such as union and intersection, and much...
SQL Mid() Synax So I am helping a friend and client who self-publishes data from an Access database. I have an amateur background in programming and have been able to handle many things for him but am by no means a... You have an extra parenthesis in your InStr formula. The second...
Component Object Model (COM) is a standard introduced by Microsoft. COM is a language-neutral way of implementing objects. It can be used in different environments, even other than where it was created It can be used across the machine boundaries A good COM component (well written) allow re...
This section describes new features of Oracle9iRelease 1 (9.0.1) and provides pointers to additional information. Oracle8inew features information is also retained to help those users migrating from Oracle7 to Oracle9iRelease 1 (9.0.1).
The Azure Cosmos DB provider has allowed SQL querying via FromSqlRaw. However, that API can be susceptible to SQL injection attacks when user-provided data is interpolated or concatenated into the SQL. In EF 9.0, you can now use the new FromSql method, which always integrates parameterized ...
across this in a form (6i) to be run on a 9i db. Not only is this code about 33 lines of code too long and issues any number of unnecessary database queries, its name is quite unrelated to its intended function. Needless to say it was easily replaced with a single call to INSTR...
MySQL 8.0 deliversNOWAITandSKIP LOCKEDalternatives in the SQL locking clause. Normally, when a row is locked due to anUPDATEor aSELECT ... FOR UPDATE, any other transaction will have to wait to access that locked row. In some use cases there is a need to either return immediately if a...
Window functions come in two flavors: SQL aggregate functions used as window functions and specialized window functions. This is the set of aggregate functions in MySQL that support windowing: COUNT, SUM, AVG, MIN, MAX, BIT_OR, BIT_AND, BIT_XOR, STDDEV_POP (and its synonyms STD, STDDEV)...
Learn how to use the MySQL OCTET_LENGTH function to retrieve the length of a string in bytes. Discover its syntax, examples, and applications.