If you are familiar with UNIX-style regular expressions, you can use them while performing queries and string manipulations. You use theREGEXP_LIKEoperator in SQL queries, and theREGEXP_INSTR,REGEXP_REPLACE, andREGEXP_SUBSTRfunctions anywhere you would useINSTR,REPLACE, andSUBSTR. See Also: "S...
Spatial datatypes can be attributed with the spatial reference system definition, for example with SRID 4326 like this: CREATE TABLE t1 (g GEOMETRY SRID 4326); The SRID is here a SQL type modifier for the GEOMETRY datatype. Values inserted into a column with an SRID property must be in tha...
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 ...
In this blog post, I will discuss about the considerations that needs to be taken into account while upgrading to MySQL 8.0 The general in-place upgrade requirement is that MySQL 8.0 will understand the disk image produced by MySQL 5.7. This is generally true, for example MySQL 8.0 is able...
Reponding to your call for questions, here’s something I’ve been thinking about lately : do you think the dc universe (the shared superhero universe, not the multimedia app which is still not available out of the States, damn it !) is instrisically more interesting than the marvel ...